Wilson has a job mowing lawns. on monday he spent $56 for gas for his lawnmower. on tuesday he cut two lawns and made $40. on wednesday he cut three lawns and made $60 but on thursday his lawnmower broke down and he had to spend money on parts to fix it. on friday the lawnmower was fixed in time to cut one more lawn for $20. if the overall value in his account for the week was $31, how much money did he spend on parts for his lawnmower?

the amount of money that he spent on parts for his lawnmower is $33

Step-by-step explanation:

Let x represent the amount of money that he spent on parts for his lawnmower.

On Monday he spent $56 for gas for his lawnmower.

The total revenue that he got from Monday to Friday would be the sum of the amount made from the two lawns that he cut on Tuesday, the three lawns that he cut on Wednesday and the one lawn that he cut on Friday. Therefore,

Revenue = 40 + 60 + 20 = $120

The total cost from Monday to Friday would be the sum of the amount spent on buying gas on Monday and the amount spent on parts to fix the lawnmower on Thursday. Therefore,

Total cost = 56 + x

Profit = revenue - cost

If the overall value in his account for the week was $31, therefore,

120 - (56 + x) = 31

120 - 56 - x = 31

- x = 31 + 56 - 120 = -33

x = $33

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