Respostas

2013-09-04T22:38:47-03:00
A)3(3X-1)=2(3X+2)
9x-3=6x+4
9x-6x=4+3
3x=7
x= 7/3

b)7(X-2)=5(X+3)
7x-14=5x+15
7x-5x=14+15
2x=29
x=29/2

c)3(2X-1)=-2(X=3)
6x-3= -2x-6
6x+2x= -6+3
8x= -3
x= -3/8

d)5X-3(X+2)=15 
5x-3x-6=15
2x=15+6
x=21/2
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