Solve 12x + 4 = 184
The solution of 12x + 4 = 184 is x = 15.
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 4 from both sides:
- 3
Divide both sides by 12:
- 4
Check: put x = 15 back into the equation.
LaTeX source of the formulas on this page
\[ 12x + 4 = 184\ \Rightarrow\ x = 15 \]
\[ 12x + 4 = 184 \]
\[ 12x + 4 - 4 = 184 - 4 \ \Rightarrow\ 12x = 180 \]
\[ \frac{12x}{12} = \frac{180}{12} \ \Rightarrow\ x = 15 \]
\[ 12\cdot15 + 4 = 180 + 4 = 184 \checkmark \]Trying values of x in 12x + 4 = 184
| x | 12x + 4 | Equals 184? |
|---|---|---|
| 13 | 160 | no |
| 14 | 172 | no |
| 15 | 184 | yes |
| 16 | 196 | no |
| 17 | 208 | no |
Questions
What is x in 12x + 4 = 184?
The solution of 12x + 4 = 184 is x = 15.
How do you solve 12x + 4 = 184?
Subtract 4 from both sides to get 12x = 180, then divide both sides by 12 to get x = 15.
How do I check the answer?
Replace x by 15: 12(15) + 4 = 184, which is 184.