Răspuns :
a+b=45
2a+3b=3(a+b)-10
2a+2b+b=3•45-10
2•45+b=135-10
90+b=125
b=125-90
b=35 => a=10
2a+3b=3(a+b)-10
2a+2b+b=3•45-10
2•45+b=135-10
90+b=125
b=125-90
b=35 => a=10
a+b=45
2a=3b+5 =>a=(3b+5)/2
(3b+5)/2 + b = 45
3b+5+2b=90
5b=85 =>b=17
a=45-17 =>a=28
2a=3b+5 =>a=(3b+5)/2
(3b+5)/2 + b = 45
3b+5+2b=90
5b=85 =>b=17
a=45-17 =>a=28