Respostas

2014-05-25T23:31:48-03:00
A) 18x= 65+43
18x=108
x= 108/18
x=6

b) 23x - 16 = 14 - 17x
23x+17x=14+16
40x=30
x = 30/40
x=3/4

c) 10y -5(1+y) = 3(2y-2) - 20
10y -5 -5y = 6y -6 -20
10y -5y -6y = -20 -6 +5
-y =  -21 (-1)
y=21

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