Ответы и объяснения

2013-05-19T21:29:13+04:00
2013-05-19T21:40:43+04:00
Х=-1.8-1.5/0.3
х=-11.
2.-х=58:(х+3)+9
-х=58:(х+3)+9*(х+3):(х+3)
-х=85:(х+3)
-5х=85
х=-17.
3.m-132=-20*7
m=272.
4)4(x-1)=x-10
4x-4=x-10
x=-2