Разложите на множители a(x+y)-a(b-x) b(7x-7y)+b(3x-y) 2c(a+3b)+c(4a-b)

1) a(x+y -(b-x) =a(x +y -b +x) =a(2x +y -b)

2) b(7x-7y +(3x-y) = b(7x -7y +3x -y) =b(10x -8y) = 2b(5x -4y)

3) c(2(a+3b) +(4a-b) = c(2a +6b +4a -b) = c(6a +5b)