Respostas

  • Usuário do Brainly
2014-02-21T21:33:51-03:00
A) 3(x-2)=4(3-x)
3x-6=12-4x
3x+4x=12+6
7x=18
x=18/7

B)10-9x+2x=2-3x
-7x+3x=2-10
-4x=-8 (-1)
4x=8
x=8/4
x=2

C) 4x-4-5x=-6+90
-x=84+4(-1)
x=-88

D)2-3x-2x+12-3x
-8x=-14 (-1)
x=14/8
x=7/4
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