your answer is 39.
First you would add 7 and 2 to get 9. From there you would get the equation 3x/9=13.
Then you would multiple by the reciprocal, or 9/1 to cancel out 3x/9.
Then u multiply 9×13 because what u do to one side you have to do to the other.
Your equation should now say 3x=117.
Finally divide by 3 to solve for x.
X=39.
