add the last two:
4x + 6y = -4
from the 1st: y = -2-2x
sub into above new equation:
4x + 6(-2-2x) = -4
4x - 12 - 12x = -4
-8x = 8
x = -1
then y = -2+2 = 0
in the 2nd:
solve the system
just need the steps how to do it
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