-3x + 2y = 9 2y = 3x + 9
y = 1,5x + 4,5
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3x-2y+9+9y-x = 2x+7y+9
x = y+3 x+2y = 9 => x = 9-2y y+3 = 9-2y 2y+y = 9-3 3y = 6 y = 2 and x = 5
the answer is -3x = 0
-6y + 14 + 4y = 32-2y = 32 - 14-2y = 18y = - 9
3x+5=14 3x=9 x=3