
A number when multiplied by , exceeds itself by . Find the number.
Answer
419.1k+ views
Hint: In this question, we need to find the unknown number. Let us consider the unknown number be and then proceed as the question says . Here the word exceeds is nothing but a number is added up. By forming an algebraic expression according to the question, we can find the unknown number.
Complete step-by-step solution:
Let the unknown number be
Given,
By forming the algebraic expression,
We get,
By simplifying,
We get,
By moving the variables to one side,
We get,
By subtracting,
We get,
By simplifying,
We get,
Thus we get the unknown number as
We can also check whether our answer is correct or not.
We have already formed an algebraic expression according to the question.
That is
Here we can substitute the x value to check whether our answer is correct or not.
Here our is
By simplifying,
We get,
Thus
From this we can conclude that our answer is absolutely correct.
Note: An algebraic expression is built up with integers, constants, variables and mathematical operations (addition, subtraction, multiplication, division etc… ) In mathematics, a symbol (letter) which doesn’t have a value is called a variable. Similarly which has a fixed value is called constant.
Complete step-by-step solution:
Let the unknown number be
Given,
By forming the algebraic expression,
We get,
By simplifying,
We get,
By moving the variables to one side,
We get,
By subtracting,
We get,
By simplifying,
We get,
Thus we get the unknown number as
We can also check whether our answer is correct or not.
We have already formed an algebraic expression according to the question.
That is
Here we can substitute the x value to check whether our answer is correct or not.
Here our
By simplifying,
We get,
Thus
From this we can conclude that our answer is absolutely correct.
Note: An algebraic expression is built up with integers, constants, variables and mathematical operations (addition, subtraction, multiplication, division etc… ) In mathematics, a symbol (letter) which doesn’t have a value is called a variable. Similarly which has a fixed value is called constant.
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