At a film festival, Film A is 4 times as long as film B Together the films are 160 mm long how long is each film

Answer 1

A + B = 160. (Film A and Film B added together equals 160 mm).

A = 4B (Film A is equal to 4 times film B).

Since you can't solve the first equation with two variables, we're going to plug in 4B instead of A in the first equation. The 4B comes from the second equation, which says that A is the same thing as 4B.

4B + B = 160

Combine the B's: 5B = 160

Divide both sides by 5: B = 32

Now plug 32 in for B in the first equation: A + 32 = 160

Subtract 32 from both sides: A = 128

A is 128 mm. B is 32 mm

Answer 2

A = 4B

A+B =5B = 160

B=32 and A= 128