Answer:
x = 2
Explanation:
Like-terms are terms within an expression or equation with the same variable and degree (aka exponent). Like-terms can be combined through addition or subtraction.
Properties of Equality
To solve the equation above, we have to use properties of equality, which is often shortened to PoE. There are different types of PoE, but for this question, there is one part we need to understand. The properties of equality state, that you can do anything to the equation if you do it to both sides.
For example, we can add 3 to the left side as long as you also add 3 to the right side.
Solving For X
In any equation, to solve for a variable, you have to isolate it. The first step is combining like terms. 9x and 3x are like terms, so we should combine them on the same side of the equation.
Subtract 9x from both sides.
Then, divide both sides by -6.
For the given equation, x = 2.