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Popular Word Problems >

The total cost, C, of an item purchased from a store is C = P+.07P, where P is the price before sales tax, and there is a 7% sales tax in effect. An equivalent formula for this situation is

Solution

T h e t o t a l cos t, C, o f an i t e m p u rc ha se d f ro m a s t ore i s C = P + .07 P, w h ere P i s t h e p r i ce b e f ore s a l es t a x, an d t h ere i s a 7% s a l es t a x in e ff ec t . A n e q u i v a l e n t f or m u l a f or t hi s s i t u a t i o n i s

Solution

Amount before tax : 6.54205 \dots

Solution steps

Translate the problem into an equation:

7 = x + 0.07 x

7 = x + 0.07 x : x = \frac{700}{107}

\frac{700}{107} = 6.54205 \dots

Amount before tax : 6.54205 \dots

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