Patricia scored 80% on a math test. she missed 4 problems. how many problems were on the test?

I think there is 20 questions.

Step-by-step explanation:

80 divided by 20 = 4

Hope this helps!

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: