Question 967432
"Is this the right answer?"


Test the result in the equation and find if the value makes the equation true.


Steps from the beginning:
{{{12x+15-2x+14=9}}}
{{{10x+29=9}}}
{{{10x=9-29}}}
{{{cross(10x=-10)}}}
{{{10x=-20}}}
{{{x=cross(-1)=-2}}}