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20-01-2017
Mathematics

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Maria is 7 years older than her brother Robert and in 2 years her age will be four times what Robert’s age was three years ago. Find their present ages.

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iLoveDoingWork iLoveDoingWork

20-01-2017

Robert is 7 years old and Maria is 14.

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billupass billupass

17-04-2020

Answer:

MARIA=14

ROBERT=7

Step-by-step explanation:

Now

MARIA=X+7

ROBERT=X

In 2 years

MARIA=X+7+2=X+9

ROBERT=X+2

3 years ago

MARIA=X+7-3=X+4

ROBERT=X-3

EQUATION

X+9=4(X-3)

X+9=4x-12

X-X+9=4x-x-12

9=3x-12

3x=21

X=7

ROBERT=7

MARIA=7+7=14

Answer Link

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