please solve step by step

Crista:

The first thing you should do is eliminate the parentheses by distributing the factor outside, as follows:

3*6x+3*3-2x+6=0

18x + 9 -2x+6=0

Next, collect like terms and simplify:

18x-2x+9+6=0

16x+15=0

Now, Subtract 15 from both sides to isolate the x term:

16x+15-15=0-15

16x = -15

Finally, divide both sides by 16:

(16x)/16 = -15/16

**x = -15/16**

Hope this helps.

George T.