8y-7x
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6x - 4y
-1 + 4x + 6x - 20 =10x - 19
-14x
Collect like terms: 3x - x + 4x - 4y + 6y + 2 = 6x + 2y + 2
2xy - 4x plus 8y - 16 equals x plus 4 in parentheses multiplied by 2y minus 4 in parentheses. So, the factors are ( x + 4) and ( 2y - 4) .