What are the two ways to solve for x and get rid of the parentheses in #2(5x+9)=78#?

Question

5582 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-10T20:13:20

Method 1: Distribute

Method 2: Divide both sides by two

#x=6#

Method 1: Distribute

In the equation, you can just distribute like this:

#2(5x+9)=78,10x+18=78,x=6#

Method 2: Divide both sides by two

Another way is just to divide both sides of the equation like this:

#2(5x+9)=78,5x+9=39,x=6#

In both ways, you get #x=6#