Solve the equation

2x - 3 = 15

2x-3=15.

Move all terms not containing X to the right side.

Equation now reads 2x=-3+15.

add the - 3 and 15 to get 12.

Equation now reads 2x=12.

Divide both sides by number in front of x.

Equation now reads 2x/2=12/2.

The solution is x=6.

First, you need to add 3 to both sides to isolate the variable x. 15-3=12, so now you have 2x=12. You only want x, not 2*x, so divide both sides by 2. 12/2 equals 6, so your variable x is equal to 6.