Eddie has saved up $45 to purchase a new camera from the local store. The sales tax in his county is 7% of the sticker price. Write an equation and solve it to determine the value of the highest priced camera Eddie can purchase with his $45, including the sales tax. Round your answer to the nearest penny.
A.x - 0.07x = 45; $48.39
B. 0.7x = 45; x = $64.29
C. 7x = 45; x = $6.43
D. x + 0.07x = 45; x = $42.06
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The last option is correct. He has 45 dollars, but that has to cover both the cost of the item AND the tax. Since we don't know the cost of the item, we can turn that into a variable, x. Then we have to find the tax added which is 7% or .07. All of this must equal 45 for him to be able to make the purchase. Thus, x(amount)+x.07(tax added)=45