Question

Solve the equation.

$x+12=9$

Short answer

Solution of given equation is $x=-3$.

Step-by-step solution

Step-1- Using Addition/Subtraction property of equality

$x+12=9$

Subtracting $12$on both sides give,

$\begin{array}{c}x+12-12=9-12\\ x=9-12\end{array}$.

Step-2- Simplify the expression on right side

Subtract 12 from 9.

$\begin{array}{c}x=9-12\\ x=-3\end{array}$

Step-3-Conclusion

Therefore, the value of $x$is -3.