Question

14. "A" es el triple de "B" y "C" es el doble de "B".
Sabiendo que: A + B + C = 90, hallar "A".

Answer 1

Explicación paso a paso:

B = 3A

(2)B = 3A(2)

2B = 6A

C = 2B

C = 6A

C = 2B = 6A

A + B + C = 90

A + 3A + 6A = 90

10A = 90

A = 9