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2014-09-26T16:06:58+03:00
3x=50-11
3x=39
x=13

135: x=11+4
135/x=15
x=135/15
x=9

1259-3y=602
1259-602=3y
657=3y
y=219

5(14+b)=170
70-5b=170
5b=170=70
5b=100
b=20

 (5x-32):4=17
5x-32=68
5x=68+32
5x=100
x=20