Question 604177: -5x-2y=21 y=2x+6
Answer by alicealc(293)   (Show Source):
You can put this solution on YOUR website! -5x-2y=21
y=2x+6
substitute y=2x + 6 into the first equation:
-5x - 2*(2x+6) = 21
-5x - 4x - 12 = 21
-9x - 12 = 21
-9x = 21 + 12
-9x = 33
x = 33/-9 = -11/3
y = 2x + 6 = 2*(-11/3) + 6 = -22/3 + 6 = -22/3 + 18/3 = -4/3
so the solution is:
x = -11/3
y = -4/3
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