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2014-09-20T16:00:50+03:00
1)(x+3)*3=102-3
x+3=99/3
x+3=33
x=30
2)(3x+2)/4=5
(3x+2)=20
3x=18
x=6
3)5x/2=2525
5x=2525*2
5x=5050
x=5050/5
x=1010