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2013-11-14T19:03:03-02:00
3x-3-x+3+5x-10=18--->7x=18+10-3+3--->7x=28-->x=28/7 que (x=4) ;D
2013-11-14T19:05:20-02:00
3(x-1)-(x-3)+5(x-2)=18
3x-3-x+3+5x-10=18
3x-x+5x=18+10+3-3
7x=28
x=28/7
x=4

Espero ter lhe ajudado'
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