How do you simplify this expression then evaluate it if x=2? 5x - 2 + 3 - x

You just put all of the like terms together, if it has an X combine it and if it doesn't have an X combine it. You end up with 4x-5

180 square centimeters

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: