Ответы и объяснения

2014-04-12T11:21:45+00:00
1169
1) 5a+3a-7a-2a=-a
2)-4b+5b-6b+5b=0
3)2.8x+3.5x-1.8x-2.5x=3x
4)3.2/11x+2.3/7x-1.2/11x-1.3/7x=1.3/7x+2.2/11x
1170
1)19a-12b-7a+24b=12a+12b=a+b
2)6a-5a-6b+5b=a-b
3)7.5x-9.4y-3.5x+4.4y=4x-5y
4)6/7x-5/13y-2.7x-1/13y=4/7x-6/13y
1171
1)4a-12-3a-6=a-18
2)-6a+12+8a+14=2a+26
3)9x-7.2-10x+7.5=-x+0.3
4)-3y+19/3+20/3-20/3y=-9.2/3y+13