Greg paid $22.05 for a backpack. This amount includes a sales tax of 5%. What was the cost of the backpack before tax? i will make you brainlest

Greg Heffley isnt gay.

Step-by-step explanation:

SUCK ON GREG'S MONEY POOR PERSON

Step-by-step explanation:

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: