Question

Mitch borrowed $500 from his brother. He mows lawns after school and on the weekends. He charges $32 a lawn and pays his friend Tom $12 a lawn to help. Mitch plans to repay his brother 40% of what he earns on each lawn. Which expression represents this situation?

Answer 1

500 - 8x

Explanation:

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Answer 2

Let's take this one at a time starting from the brother's net income because this would be the root basis. We let x be the number of lawns his brother and Tom mowed.

Brother's Net Income = 32x - 12x = 20x

Mitch promises to pay the borrowed money of $500 plus 40% of what his brother earns. The algebraic equation for this is:

Mitch's payment = $500 + 0.4(20x) = $500 +$8x