Solve the following system of linear equations in two variables by Substitution method. x=-2y-2 2x+5y=-7

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Equations
asked 2021-01-19
Solve the following system of linear equations in two variables by Substitution method.
x=-2y-2
2x+5y=-7

Answers (1)

2021-01-20
Consider the following system of linear equations:
x=-2y-2...(1)
2x+5y=-7...(2)
Substitute equation (1) in equation (2):
2(-2y-2)+5y=-7
-4y-4+5y=-7
y=-7+4
y=-3
\(\displaystyle{x}=-{2}\times{\left(-{3}\right)}-{2}\)
=6-2
=4
0

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