Question

Раскрыть скобки:
1. (a-b+c)-(a-b)=
3-(x-y+3)=
a-(a-b+c)=
(x-y)-(x+y)=
(x-y)-(y-x)=
2. (m-p+q)-p=
(a-b+1)-(a+b-1)=
m-(m-p+q)=
(m-p+5)-(m+p-3)=
m-(p-m)=

Answer 1

1. a-b+c-a+b = c
3-x+y-3 = -x+y = y-x
a-a+b-c = b-c
x-y-x-y = -2y
x-y+y+x = 2x
2. m-p+q-p = m-2p+q
a-b+1-a-b+1 = -2b+2
m-m+p-q = p-q
m-p+5-m-p+3 = -2p+8
m-p+m = 2m - p