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2010-04-12T08:22:53+02:00
97+5=2x
102=2x
102/2=x
51=x

43-7=9x
36/9=x
4=x

17-11=-12x
6/12=x
0.5=x
3 3 3
2010-04-12T08:23:19+02:00
A)97+5=2x
102=2x/2
51=x
b)43-7=9x
36=9x/9
4=x
c)17-11=-12x
6=-12x/-12
1/2=x
3 3 3
2010-04-12T08:26:27+02:00
A) 97=2x-5
97+5=2x
2x=102
x=102:2
x=51

b)43=7+9x
43-7=9x
36=9x
x=36:9
x=4

c)17=11-12x
17-11=-12x
6=-12x
x=6:(-12)
x=0.5
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