One gallon of a certain brand of gasoline costs $4.50. How many gallons could be purchased with $75.00?

16 gallons could be purchased with $75.00.

Step-by-step explanation:

Cost of one gallon of gasoline = $4.50

Cost of total gallons of gasolines = $75

Number of gallons of gasolines = $75/$4.50

= 16.66

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:

16.80 times .20= 3.36

step-by-step explanation: