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Anonymous
It is equivalent to 3(4x+3y) when factored
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9y - 4x
Y-8x plus 9y equals 10y-8x.
9y+3 = 5y+13 9y-5y = 13-3 4y = 10 y =2.5
12x-4y+9z+2y =12x-2y+9z
5x-4y+9y+x-9+7 = 5x + x - 4y + 9y - 9 + 7 = 6x + 5y - 2 ■