SOLUTION: Ann's age is seven-tenths of bills age. In 4 years Ann's age will be eight-elevenths of bill's age. How old is bill now?

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Question 1086805: Ann's age is seven-tenths of bills age. In 4 years Ann's age will be eight-elevenths of bill's age. How old is bill now?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%287%2F10%29B
10A=7B
In 4 years,
A%2B4=%288%2F11%29%28B%2B4%29
11%28A%2B4%29=8%28B%2B4%29
11A%2B44=8B%2B32
11A=8B-12
Multiply both sides by 10,
11%2810A%29=80B-120
Substitute,
11%287B%29=80B-120
77B=80B-120
-3B=-120
B=40
Now use either equation to solve for A.