What is the total cost of a pair of jeans that are priced $50.00 if there is 7% sales tax?
$53.75
$55.50
$57.50

The answer is $53.50

Step-by-step explanation:

Add 100% and 7%

Then multiply 107% times 50 because you have to pay the full price which is 100%, plus sales tax which is the 7%.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: