Identify the property’s that justifies the statement: if 4x-3=7, then 4x=10

Step-by-step explanation:

The equation shown above does not show the substitution property. Instead, it shows the Addition Property of Equation where 3 is added to both of its sides. This is shown below,

                                   4x - 3 = 7

                               4x - 3 + 3 = 7 + 3

                                   4x = 10

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: