SOLUTION: Joan and Maria earn money by babysitting. If Joan earns twice as much as Maria, and the two girls earn a total of $40, how much does Maria earn?

Question 164832: Joan and Maria earn money by babysitting. If Joan earns twice as much as Maria, and the two girls earn a total of $40, how much does Maria earn?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Joan and Maria earn money by babysitting. If Joan earns twice as much as Maria, and the two girls earn a total of $40, how much does Maria earn?
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Using one variable:
Let Joan earnings be "x"; then Maria earned "40-x".
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EQUATION:
j = 2M
x = 2(40-x)
x = 80-2x
3x = 80
x = $26.67 (Joan's earnings)
40-x = $13.33 (Maria's earnings)
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Cheers,
Stan H.
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