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2014-08-21T10:21:04+03:00
A) 8(x-7)=8-6(x+1)
8x-56=8-6x-6
8x+6x=8-6+56
14x=58
x=58/14=29/7

b)6a-3a+11=a-2
 6a-3a-a=-2-11
 2a=-13
 a= -13/2

c)
 x-1/x+2 = 3/4
4(x-1)=3(x+2)
4x-4=3x+6
4x-3x=6+4
x=10 
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