# When 3 times the number x is added to 9, the result is 3. What number results when 2 times x is added to 15?

##### 1 Answer
Oct 30, 2016

The answer is $- 7$

#### Explanation:

To solve the second part of this part the first part must be solved first to determine the value of $x$.

$3 x + 9 = 3$

$3 x = - 12$

$x = - 4$

Now we can substitute $- 4$ for $x$ in the second expression in this problem.

$2 x + 15 = \left(2 \cdot - 4\right) + 15 = - 8 + 15 = - 7$