How do you solve 3( 2x + 9) = 39?

2 Answers
Mar 14, 2018

Reduce, reduce, reduce and get x=2

Explanation:

First thing is first: Divide both sides by 3 to eliminate the coefficient outside of the parentheses:

3/3(2x+9)=39/3 rArr 2x+9=13

Next, subtract 9 from both sides to get 2x by itself:

2x cancel(+9-9) = 13-9 rArr 2x=4

Finally, divide both sides by 2 to get the solution for x:

2x/2=4/2 rArr color(red)(x=2)

Mar 14, 2018

x = 2

Explanation:

Open the brackets:

3(2x+9)=39
6x+27=39

Subtract 27 from 39 (to make x subject):

39-27=12
6x=12

Divide both sides by 6 to get x by itself:

6x-:6=x
12-:6=2

x=2