What is the value of x in the proportion?
9/12=12/x

Answer- X=16

Explanation:

Determine the defined range
9/12=12/x, x≠0

Reduce the fraction with 3
3/4=12/x

Simplify the equation using cross-multiplication
3x=48

Divide both sides of the equation by 3
x=16, x≠0

Check if the solution is in the defined range
x=16

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.