Раскрыть скобки. (m+n)-(m-n); (m+3)-(6m+5)-(m-1); (x-y)+(x-y)-(2x+y);...

Question

Раскрыть скобки. (m+n)-(m-n); (m+3)-(6m+5)-(m-1); (x-y)+(x-y)-(2x+y); (0,2x-3)-(x-2)-(0,4x-1)

Answer 1

1) m+n-m+n= 2n

2) m+3-6m-5-m+1= -1-6m

3) x-y+x-y-2x-y=-3y

4) 0.2x-3-x+2-0.4x+1=-1.2x