Solve 12x + 6 = 30
The solution of 12x + 6 = 30 is x = 2.
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 6 from both sides:
- 3
Divide both sides by 12:
- 4
Check: put x = 2 back into the equation.
LaTeX source of the formulas on this page
\[ 12x + 6 = 30\ \Rightarrow\ x = 2 \]
\[ 12x + 6 = 30 \]
\[ 12x + 6 - 6 = 30 - 6 \ \Rightarrow\ 12x = 24 \]
\[ \frac{12x}{12} = \frac{24}{12} \ \Rightarrow\ x = 2 \]
\[ 12\cdot2 + 6 = 24 + 6 = 30 \checkmark \]Trying values of x in 12x + 6 = 30
| x | 12x + 6 | Equals 30? |
|---|---|---|
| 0 | 6 | no |
| 1 | 18 | no |
| 2 | 30 | yes |
| 3 | 42 | no |
| 4 | 54 | no |
Questions
What is x in 12x + 6 = 30?
The solution of 12x + 6 = 30 is x = 2.
How do you solve 12x + 6 = 30?
Subtract 6 from both sides to get 12x = 24, then divide both sides by 12 to get x = 2.
How do I check the answer?
Replace x by 2: 12(2) + 6 = 30, which is 30.