Question

A+A+A= 30 , A+B+B = 20 , B+ C+ C = 9 , A+ B * 3C = ?

Answer 1

Answer:

10+5×6=40

or

10+5×6=90

Answer 2

Answer:

Step-by-step explanation:

A + A + A = 30 ---> 3A = 30 --->

A = 10 ---> 10 + B + B = 20 --->

10 + 2B = 20 ---> 2B = 10 --->

B = 5 ---> 5 + C + C = 9 --->

5 + 2C = 9 ---> 2C = 4 ---> C = 2

---> A + B*3*C = 10 + 30 = 40.