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2014-10-14T18:22:33+03:00
D) 8b=58-26
8b=32
b=32:8
b=4
e)6+3x=9
3x=9-6
3x=3
x=1
f)  \frac{5-x}{3} = 15 |*3
5-x=45
-x=45-5
-x=40 | *(-1)
x= -40