Question

Solve 2x – 5 = 3(2x + 5). You must show all work.

Answer 1

First, work the parenthesis.
3(2x+5)= (3 x 2x) + (3 x 5). so, that makes it 6x + 15.

Now the problem looks like this -2x - 5= 6x + 15.

Next, move the variables to one side. Subtract both sides by 2x.
(2x - 5) -2x = -5
(6x + 15) -2x = 4x + 15.

The problem is now -5 = 4x + 15

Now, subtract 15 from both sides.
-5 - 15 = -20.
(4x + 15) - 15= 4x

The problem is now -20 = 4x.
All that's left is to simplify. Divide 4 to both sides.
-20/4 = -5.
4x/4 = 1x.

Your answer is -5 = x (x = -5).