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# Age problem Inee and Imee are twins. Their mother is 28 years older than they are and 4 times as old as the sum of their ages. How old are Inee and Imee now?

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They are 4 years old and the mother is 32. This is a system of two equations. The first equation is 28 + x (their mother is 28 years older than they are). The second equation is 8x (she is 4 times as old as their sum) their sum is 2x (x being the twins age) time 4 which is 8x. Set these two equal to each other and you get 28 + x = 8x, bring the x to the other side by subtracting and x on both sides and you end up with 28=7x , now divide off the 7 and get x=4. Verify your work and take 4 + 28 and you get 32. Now take 4*2 (sum of their ages ) and multiply it by 4 and you get 32.

Posted on Jun 26, 2009

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X+X+28=4(X+X)
2X+28=4X+4X
28=8X-2X
28=6X
X=4

The twins are 4 yrs. old. The mother is 32.

Do I pass?

Posted on Apr 21, 2009

• Wayne Mineard Apr 21, 2009

Duh! Should be:

X+28=4(X+X)

X+28=8X

28=8X-X

28=7X

4=X

Answer is 4. Mother is 32.

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### Adjoa is three years older than her brother Kwame.seven years ago,the sum of their ages 13years.calculate the sum of their present ages.

Let Adjoa's age be x and Kwame's y.
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• Seven years ago sum of their ages was 13: (x-7)+(y-7)=13
• Now you substitute first equation into second equation: (y+3-7)+(y-7)=13
• 2y-4-7=13
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### The sum of ages of marian, diana and carlos are 17. Two years from now marian will twice as old as diana. if carlos is half as old as marian four years from now. How ald are they now ? Pls show the...

Let m be Marian's age, d Diana's age and c Carlos age.
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let c = cory's age now let s = her sisters age now
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4 years ago cory was 4 times older than her sister
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We can then use simultaneous equations to solve the two equations
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The average is 20, it means the total is 60. The sum of ratio is 15 (3+5+7)
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### Cindy is 5 years older than Alex and 7 years older than peter sum

Three unknowns with three equasions:
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first solve for peters age in terms of alex's age.
c = p + 7 or
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