From the set {36, 16, 13}, use substitution to determine which value of x makes the equation true. 3x = 39

Step-by-step explanation:

3x = 39so instead of just subbing in all ur answer choicesjust solve for x

3x = 39...divide both sides by 3, cancelling out the 3 on the left side

x = 39/3

x = 13 <

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: