Solve 6x + 2 = 122
The solution of 6x + 2 = 122 is x = 20.
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 2 from both sides:
- 3
Divide both sides by 6:
- 4
Check: put x = 20 back into the equation.
LaTeX source of the formulas on this page
\[ 6x + 2 = 122\ \Rightarrow\ x = 20 \]
\[ 6x + 2 = 122 \]
\[ 6x + 2 - 2 = 122 - 2 \ \Rightarrow\ 6x = 120 \]
\[ \frac{6x}{6} = \frac{120}{6} \ \Rightarrow\ x = 20 \]
\[ 6\cdot20 + 2 = 120 + 2 = 122 \checkmark \]Trying values of x in 6x + 2 = 122
| x | 6x + 2 | Equals 122? |
|---|---|---|
| 18 | 110 | no |
| 19 | 116 | no |
| 20 | 122 | yes |
| 21 | 128 | no |
| 22 | 134 | no |
Questions
What is x in 6x + 2 = 122?
The solution of 6x + 2 = 122 is x = 20.
How do you solve 6x + 2 = 122?
Subtract 2 from both sides to get 6x = 120, then divide both sides by 6 to get x = 20.
How do I check the answer?
Replace x by 20: 6(20) + 2 = 122, which is 122.