Question

A plus b egal cu 20 b plus c egal 30 aflați 2a plus 3b plus c
URGENT

Answer 1

a+b=20

b+c=30

2a+3b+c=?

a=30-20

a=10

b=20-10

b=10

c=30-10

c=20

2x10+3x10+20=

20+30+20=70