Solve 12x + 15 = 183
The solution of 12x + 15 = 183 is x = 14.
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 15 from both sides:
- 3
Divide both sides by 12:
- 4
Check: put x = 14 back into the equation.
LaTeX source of the formulas on this page
\[ 12x + 15 = 183\ \Rightarrow\ x = 14 \]
\[ 12x + 15 = 183 \]
\[ 12x + 15 - 15 = 183 - 15 \ \Rightarrow\ 12x = 168 \]
\[ \frac{12x}{12} = \frac{168}{12} \ \Rightarrow\ x = 14 \]
\[ 12\cdot14 + 15 = 168 + 15 = 183 \checkmark \]Trying values of x in 12x + 15 = 183
| x | 12x + 15 | Equals 183? |
|---|---|---|
| 12 | 159 | no |
| 13 | 171 | no |
| 14 | 183 | yes |
| 15 | 195 | no |
| 16 | 207 | no |
Questions
What is x in 12x + 15 = 183?
The solution of 12x + 15 = 183 is x = 14.
How do you solve 12x + 15 = 183?
Subtract 15 from both sides to get 12x = 168, then divide both sides by 12 to get x = 14.
How do I check the answer?
Replace x by 14: 12(14) + 15 = 183, which is 183.