Question

Упростите выражение:
1)23а-7b-4а+10b=
2)6,5a+5,3b-9b-6,5a=
3)3,1/2b-4,9c-3,1/2b+7c=
4)ab-2ab-3b+ab+5b=
5)8xy+9x-9xy-7x=
6)17,8x+9y-5,5x-10y=

Answer 1

1)23а-7b-4а+10b=19a-3b
2)6,5a+5,3b-9b-6,5a=-3.7 b
3)3,1/2b-4,9c-3,1/2b+7c=2.1c
4)ab-2ab-3b+ab+5b=2b
5)8xy+9x-9xy-7x=xy+2x=x(y+2)
6)17,8x+9y-5,5x-10y=12.3x-y