SOLUTION: Solve by using equation : holly earned $220 this week. If this is $12 less than twice last's week earnings, how much did she earn last week ?

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Question 1037497: Solve by using equation : holly earned $220 this week. If this is $12 less than twice last's week earnings, how much did she earn last week ?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
x = what she earned last week.

this week she earned 220.

this is equal to 12 less than twice what she earned last week.

220 = 2 * x - 12 is your equation.

solve for x to get x = (220 + 12) / 2 = 232 / 2 = 116.

she earned 116 last week.

this week she earned 12 less than 2 times that.

this week she earned 2 * 116 - 12 = 232 - 12 = 220.

numbers check out so the solution appears to be good.

solution is that she earned 116 last week.