# Algebra 1- Math

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use substitution to solve the system 2x-y=-4 -3x+y=-9

• Algebra 1- Math -

2x - y = -4
-3x + y = -9

From the first equation:

y = 2x + 4
Substitute this into the second equation:

-3x + 2x + 4 = -9
-x + 4 = -9
-x = -13
x = 13

Then plug this answer back into the first equation

2*13 - y = -4
26 - y = -4
-y = -30
y = 30

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