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2014-04-30T16:21:25+03:00
A+b=95
a=3b-5
3b-5+b=95
4b-5=95
4b=100
b=25
a=3*25-5
a=75-5
a=70
2014-04-30T16:22:24+03:00
A+b=95
a=3b-5
3b-5+b=95
4b=95+5
b=100/4
b=25
a=3·25-5
a=75-5
a=70
70+25=95