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.
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?
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