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2014-06-14T16:35:49+03:00
A+b=1010

a-10=b/4   aducem la acelasi numitor

4a-40=b

a+4a-40=1010
5a=1010+40
5a=1050
a=210

b=1010-210
b=800
2 5 2
2014-06-14T16:43:10+03:00
A+b=1010
4(a-10)=b
4a-40=b
a+4a-40=1010
5a-40=1010
5a=1050
a=210
b=1010-210=800
1 5 1