Răspunsuri

2014-10-08T07:37:04+03:00
(a-b)-12=24
(a+b):7=10
a-b=24+12
a-b=36
a+b=10x7
a+b=70

a-b=36
a+b=70 (luate sistem, b se reduce)
2a=106(adunare)
a=106:2
a=53
a-b=36
53-b=36
b=17
(a-b)-12=24
(53-17)-12=24
24=24