Solve 2x + 12 = 36
The solution of 2x + 12 = 36 is x = 12.
How to work it out
- 1
The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.
- 2
Subtract 12 from both sides:
- 3
Divide both sides by 2:
- 4
Check: put x = 12 back into the equation.
LaTeX source of the formulas on this page
\[ 2x + 12 = 36\ \Rightarrow\ x = 12 \]
\[ 2x + 12 = 36 \]
\[ 2x + 12 - 12 = 36 - 12 \ \Rightarrow\ 2x = 24 \]
\[ \frac{2x}{2} = \frac{24}{2} \ \Rightarrow\ x = 12 \]
\[ 2\cdot12 + 12 = 24 + 12 = 36 \checkmark \]Trying values of x in 2x + 12 = 36
| x | 2x + 12 | Equals 36? |
|---|---|---|
| 10 | 32 | no |
| 11 | 34 | no |
| 12 | 36 | yes |
| 13 | 38 | no |
| 14 | 40 | no |
Questions
What is x in 2x + 12 = 36?
The solution of 2x + 12 = 36 is x = 12.
How do you solve 2x + 12 = 36?
Subtract 12 from both sides to get 2x = 24, then divide both sides by 2 to get x = 12.
How do I check the answer?
Replace x by 12: 2(12) + 12 = 36, which is 36.