Solve 6x + 4 = 82
The solution of 6x + 4 = 82 is x = 13.
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 6:
- 4
Check: put x = 13 back into the equation.
LaTeX source of the formulas on this page
\[ 6x + 4 = 82\ \Rightarrow\ x = 13 \]
\[ 6x + 4 = 82 \]
\[ 6x + 4 - 4 = 82 - 4 \ \Rightarrow\ 6x = 78 \]
\[ \frac{6x}{6} = \frac{78}{6} \ \Rightarrow\ x = 13 \]
\[ 6\cdot13 + 4 = 78 + 4 = 82 \checkmark \]Trying values of x in 6x + 4 = 82
| x | 6x + 4 | Equals 82? |
|---|---|---|
| 11 | 70 | no |
| 12 | 76 | no |
| 13 | 82 | yes |
| 14 | 88 | no |
| 15 | 94 | no |
Questions
What is x in 6x + 4 = 82?
The solution of 6x + 4 = 82 is x = 13.
How do you solve 6x + 4 = 82?
Subtract 4 from both sides to get 6x = 78, then divide both sides by 6 to get x = 13.
How do I check the answer?
Replace x by 13: 6(13) + 4 = 82, which is 82.