Question

A = B+C, A+B = 10, C = 50 B = ??

Answer 1

C = 50 , substitute in 1

A = B + 50 susbstitute in 2

B+50+B = 10

2B = -40 , B = -20

Hope it helped you

Answer 2

Step-by-step explanation:

A

$10 = b + 50 = b = - 40$