Question

Question #8fd98

Answer 1

Like terms have the same variable, and the same power.

Explanation:

`-4`, `-5`, and `90` are all like terms because they don't have a variable. These are called 'constants'.

So, add the `-4` and `-5` to the `90` to get `99`. Note these are added as positive values since they're negative on the left-hand side of the equation.

Then you have

`9x = 99`

Divide both sides by `9` to get

`x = 11`

You divide since it's the inverse operation for multiplication.

Check your work by plugging `11` back into your equation for variable `x`.

`-4 - 9 + 9*11 = 90`