Question

If 3a − c = 5b and 3a + 3b − c = 40, what is the value of b?

Answer 1

b = 5

Step-by-step explanation:

add both of the equations together

3a - c = 5b

3a + 3b - c = 40

= 3b = 40 - 5b

then make it equal to 40 meaning

8b = 40

b = 5