8+х=х+2 ____ 72+х=х+1 _ ___ 5 28+х=х+5 _ 4х+8+5=7х __ 2

Question

8+х=х+2
____
7
2+х=х+1
_ ___
5 2
8+х=х+5
_
4
х+8+5=7х
__
2

Answer 1

1)8+х\7=х+2
7*(х+2)=8+х
7х+14=8х
8х-7х=14
х=14
2)2+х\5=х+1\2
2*(2+х)=5*(х+1)
4+2х=5х+5
5х-2х=4-5
3х=-1
х=-1\3
3)8+х\4=х+5
8+х=4*(х+5)
8+х=4х+20
х-4х=20-8
-3х=12
х=-4
4)х+8\2+5=7х
х+8+5*2\2=7х
х+8+10\2=7х
х+18\2=7х
х+18=2*7х
х+18=14х
х-14х=-18
-13х=-18
х=18\13