Denise L. answered • 03/09/18

Tutor

5.0
(1,810)
Effective Online Tutor for Test Prep & Math/ Science Classes

Hi again Lubna.

Same idea as your last problem:)

a + b+ c= 140

a = 2b

b = 2c

Substitute into the first equation and solve!

I tutor math on Wyzant regularly if you ever want to schedule a session!