Math
posted by Rheannon .
Colin is working to earn some money for a new cd player. On saturday he earned half as much as he did on sunday, but twice as much as he did on friday. During those three days he earned $70. How much did he earn each day?

Let x = amount earned on Saturday, then 2x = Sunday and x/2 = Friday
x + 2x + x/2 = 70
Solve for x.
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