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Grace earns 7$ for each car she washes she always saves 25$ this weekshe wants to have at least 65$ in spending money how many cars must she wash

Sagot :

IGreenidn
We can write an equation:

y = 7x + 25

Where 'y' is the total cost and 'x' is the number of cars she washes.

Plug in 65 for 'y' and solve for 'x':

65 = 7x + 25

Subtract 25 to both sides:

40 = 7x

Divide 7 to both sides:

x = 5.71

I guess we should round to the nearest whole number, so we round to 6 cars.
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