christiankhoury christiankhoury

16-11-2018
Mathematics

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Dave wants to buy a bike for $180. He has $40. Dave mows lawns for $10 per lawn. a. Write an equation that can be used to find x, the number of lawns Dave needs to mow to have enough money to buy the bike.

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ZDerpKnightJr ZDerpKnightJr

16-11-2018

Answer: x=14

Equation: 40+10x=180

Reasoning: First subtract 40 from both sides (40-40 and 180-40)

10x=140

Now divide both sides by 10 (10x/10 and 140/10)

x=14

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