Упростить: 5х + (7y-x) - (3x+7y), 8(x-3) + 4 (5-2x)

Question

Упростить: 5х + (7y-x) - (3x+7y), 8(x-3) + 4 (5-2x)

Answer 1

5x+7y-x-3x-7y= x

8x-24+20-8x= -4

Answer 2

1)5x+7y-x-3x-7=x
2)8x-24+20-8x=-4