Question 1036802
 Charlotte and Edgar's ages add up to 22. Charlotte is one year older than twice Edgar's age. How old are Charlotte and Edgar? 
I have to show work with a linear equation. 
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c + e = 22
c = 2e + 1
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Substitute for "c" and solve for "e"::
2e+1 + e = 22
3e = 21
Edgar = 7 yrs
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Solve for "c"::
c = 2e + 1
c = 2*7+1
Charlotte = 15 yrs 
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Cheers,
Stan H.