Question 933826
Cheryl is three years more than three times as old as Ben. In 20 years the sum of their ages will be 87. How old is Ben now?
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let x= Ben's age
3x+3=Cheryl's age
..
In 20 years:
x+20=Ben's age
3x+3+20=3x+23=Cheryl'age
..
x+20+3x+23=87
4x=87-43
4x=44
x=11
How old is Ben now? 11