Mathematics
Milah
2015-11-02 18:03:33
9+y=3x 6y=-3x-12 Help please
ANSWERS
momi2010
2015-11-02 21:37:28

9 + y = 3x....y = 3x - 9 6y = -3x - 12 6(3x - 9) = -3x - 12 18x - 54 = -3x - 12 18x + 3x = -12 + 54 21x = 42 x = 42/21 x = 2 9 + y = 3x 9 + y = 3(2) 9 + y = 6 y = 6 - 9 y = -3 solution is (2,-3) <==

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