Maria 2

Maria is seven years older than her brother Robert, and in 2 years, her age will be four times Robert's age three years ago. Find their present ages.

Correct answer:

M =  14
R =  7

Step-by-step explanation:


M=7+R
M+2 = 4·(R-3)

M-R = 7
M-4R = -14

Row 2 - Row 1 → Row 2
M-R = 7
-3R = -21


R = -21/-3 = 7
M = 7+R = 7+7 = 14

M = 14
R = 7

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