SOLUTION: In 7 years, Maria will be four times as old as Angelica will be then. The sum of their ages now is 71. How old will each of them be in 5 years?

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Question 98: In 7 years, Maria will be four times as old as Angelica will be then. The sum of their ages now is 71. How old will each of them be in 5 years?
Answer by ichudov(499) About Me  (Show Source):
You can put this solution on YOUR website!
All you have to do is express it as equations:
Maria + 7 = 4*(Angelica +7)
Maria + Angelica = 71
Replace Maria with M and Angelica with A
M=4*A = -7-4*7
M+A = 71
This is a classic linear system of equations, for which I have a solver that shows work.