Răspunsuri

2014-05-22T18:47:06+03:00
A+b+c=650
a=b-25
c/b+15=4
c=4b-15
b-25+b+4b-15=650
6b-40=650
6b=690
b=115
a=115-25
a=90
c=4x115-15
c=460-15
b=445
90+115+445=645