Hello clc98,

When solving these types of equations it's best to gather up all the x's in one place. So,

Step 1. Multiply out any brackets:

becomes which then becomes

the last equation is because , i.e., a minus multiplied by a minus gives a plus.

So after step 1 we have .

Step 2. Put all the x's together. 170x + 70x becomes 240x because I can add the x's (I can add the terms that are alike).

So now the equation becomes,

Step 3. Get all the x terms on one side and all the normal numbers on the other. We can add 70 to both sides of the equation to get rid of the -70.

So the equation becomes,

which becomes

Step 4. Now we want to get the x on its own. We divide both sides by 240,

becomes just and becomes 0.29166666...

So we have,

.