Answer
Verified
480k+ views
Hint:- Use the BODMAS rule to simplify the equation. So first open the bracket, multiply the terms and add the 2 terms and equate it with RHS to find the value of x.
Given an equation, x(21 -7) + 7\[ \times \]2 =70
We have to solve the equation and find the unknown variable x. For solving the given equation , we are going to start by applying the BODMAS rule to simplify the equation.
BODMAS rule depicts the correct sequence of operations to be executed. Here,
B – Bracket
O – of
D – Division
M – Multiplication
A – Addition
S – Subtraction
The rules say start from Brackets , then follow the sequence accordingly.
In our equation, x(21 -7) + 7\[ \times \]2 =70
We have brackets , so , first we need to solve the brackets. On solving brackets , we get
x(14) + 7\[ \times \]2 =70
Now , we don’t have division so next comes multiplication. We have to perform a multiplication operation on the above equation. On performing multiplication , we get
14x + 14 =70
Now , we can’t directly perform addition or subtraction. So, taking constant term from left hand side to right hand side, we get
14x = 70 -14
Now, performing the subtraction operation.
14x= 56
And now dividing both with the coefficient of x. We get,
x = 4.
Hence, x = 4.
Note:- In these types of questions, we need to remember the two basic steps. Step 1 is to simplify the equation using the BODMAS rule. Step 2 is to equate the unknown variable to the constant i.e. Sending all constants on the right hand side and bringing the unknown on the right hand side.
Given an equation, x(21 -7) + 7\[ \times \]2 =70
We have to solve the equation and find the unknown variable x. For solving the given equation , we are going to start by applying the BODMAS rule to simplify the equation.
BODMAS rule depicts the correct sequence of operations to be executed. Here,
B – Bracket
O – of
D – Division
M – Multiplication
A – Addition
S – Subtraction
The rules say start from Brackets , then follow the sequence accordingly.
In our equation, x(21 -7) + 7\[ \times \]2 =70
We have brackets , so , first we need to solve the brackets. On solving brackets , we get
x(14) + 7\[ \times \]2 =70
Now , we don’t have division so next comes multiplication. We have to perform a multiplication operation on the above equation. On performing multiplication , we get
14x + 14 =70
Now , we can’t directly perform addition or subtraction. So, taking constant term from left hand side to right hand side, we get
14x = 70 -14
Now, performing the subtraction operation.
14x= 56
And now dividing both with the coefficient of x. We get,
x = 4.
Hence, x = 4.
Note:- In these types of questions, we need to remember the two basic steps. Step 1 is to simplify the equation using the BODMAS rule. Step 2 is to equate the unknown variable to the constant i.e. Sending all constants on the right hand side and bringing the unknown on the right hand side.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
Which are the Top 10 Largest Countries of the World?
How do you graph the function fx 4x class 9 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE