Question 256762
"7 years ago I was 11 times older than my daughter, now I am 4 times older than her, how old am I?
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Let x = your age
and d = your daughter's age
then 
from "7 years ago I was 11 times older than my daughter"
x-7 = 11(d-7)    (equation 1)
.
and from "I am 4 times older than her"
x = 4d (equation 2)
.
Solving equation 2 for d:
d = x/4
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Substitute the above into equation 1:
x-7 = 11(d-7) 
x-7 = 11(x/4-7) 
Multiply both sides by 4:
4x-28 = 11(x-28) 
4x-28 = 11x-308
-28 = 7x-308
280 = 7X
40 years old = x