23x = 115
x is being multiplied by 23, but you want x alone. Since x is being multiplied by 23, you need to undo the multiplication to end up with x alone. The operation that is opposite to multiplication is division. You need to divide 23x by 23 to end up with x alone. A rule of equations is that you must divide both sides by the same number. Divide both sides by 23.
23x/23 = 115/23
x = 5
