To Solve: The given systems of linear equations by substitution.
Answer to Problem 9E
The required solution is
Explanation of Solution
Given information:
The system of linear equations:
Calculation:
(Equation 1)
(Equation 2)
Equation 1 is already solved for x
Substitute
(Equation 2)
(Substitute
(Add 4y on both sides)
(Simplify)
(Divide each side by 5)
(Simplify)
Substitute 3 for y in equation 1 and solve for x.
(Equation 1)
(Substitute 3 for y)
(Simplify)
Therefore, the solution is
Check
Equation 1
9Substitute the values of x and y)
(Simplify)
Hence correct.
Equation 2
(Substitute the values of x and y)
Hence the solution is correct.
Chapter 5 Solutions
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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