To find: the solution of each system using addition and subtraction method.
Answer to Problem 3MRE
The value of
Explanation of Solution
Given:
Concept used:
In the elimination method:
Either add or subtract equation to get an equation in one variable.
When the coefficients in one variable are opposites then add the equations to eliminate the variable and when the coefficients of one variable are equal and subtract the equation to eliminate a variable.
Calculation:
According to the given equation:
Multiplying the first equation by
Multiply the second equation by
Solving equation
By substituting the
Hence, the value of
Chapter 9 Solutions
Algebra: Structure And Method, Book 1
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