Solving systems by substitution
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Answer:
Step-by-step explanation:
First, try to make the equations with one variable on one side.
2x + 3y = -10
y = -7x + 3.
The second equation already does this for us. We take this value for y, and substitute it in the first equation for y.
2x + 3(-7x + 3) = -10
Simplify.
2x -21x + 9 = -10
-19x = -19
-x = -1
x = 1.
Then, with this value for x, solve for y.
y = -7(1) + 3
y = -7 + 3
y = -4.
Therefore your system of equations results in values x = 1, and y = -4.