-2x-9y=-25 and -4x-9y=-23
solve each system by elimination
We'll subtract the second equation
from the first equation.
-2x - 9y = -25
-(-4x - 9y = -23)
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2x = -2
x = -1
Substitute that into the first equation:
-2(-1) - 9y = -25
2 - 9y = -25
-9y = -25 - 2 = -27
y = -27 / -9 = 3
Now, substitute both values into equation two
-4(-1) - 9(3) = -23
4 - 27 = -23
-23 = -23
x = -1 and y = 3