Question

a+b+c=300 a+b=120 b+c=90

Answer 1

a+b=120
b+c=90
a+b+b+c=120+90
a+2b+c=210
a+b+c=300
b=(a+2b+c)-(a+b+c)
b=300-210
b=90
90+c=90
c=90-90
c=0
a+90=120
a=120-90
a=30

Answer 2

a+b+c=300
a+b=120
b+c=90
a+b+c=300
120+c=300
c=300-120
c=80
a+b+c=300
a+90=300
a=300-90
a=210
210+80=290
a=300-290
a=10
10+210+80=300


SPER CA TEAM AJUTAT