
How do you solve the system of equations and ?
Answer
469.5k+ views
Hint: We will solve this set of equations using substitution method. We will take an equation, that is, and write the expression in terms of .We will substitute this expression in terms of in the second equation which is, solving which we will get the value of . We will substitute the value of , in the equation which we wrote in terms of and we get the value of on solving.
Complete step by step solution:
According to the given question, we have been given a set of two equations having two variables and we have to solve for and . And we will be using the substitution method to solve this system of equations.
We will first take the equation and write it in terms of , we have,
----(1)
Now, we have the expression in terms of , substituting in the equation ,
We get,
Opening the parenthesis, we get,
Multiplying the terms, we get,
Separating terms and the constants, we have,
Solving further we get,
Substituting this value of in equation (1), we get,
Solving, we have,
Therefore,
Note: The substitution method used in the above method is a good method and prevents mixing the calculation for both the variables. This is because we are carrying out the calculation for each variable separately. But if the calculation in one step is done wrong then it will affect the whole answer. So, calculations need to be carried out carefully.
Complete step by step solution:
According to the given question, we have been given a set of two equations having two variables and we have to solve for
We will first take the equation
Now, we have the expression in terms of
We get,
Opening the parenthesis, we get,
Multiplying the terms, we get,
Separating
Solving further we get,
Substituting this value of
Solving, we have,
Therefore,
Note: The substitution method used in the above method is a good method and prevents mixing the calculation for both the variables. This is because we are carrying out the calculation for each variable separately. But if the calculation in one step is done wrong then it will affect the whole answer. So, calculations need to be carried out carefully.
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