Question

Упростите вырожение
1) (4a+2b)-(11a-b)
2) (x+y)+(x-y)-(y-x)

Answer 1

1) (4a+2b)-(11a-b)= 4a+2b-11a+b= -7+2b
2) (x+y)+(x-y)-(y-x)= x+y+x-y-y+x=3x-y