Solve 2x + 8 = 6
The solution of 2x + 8 = 6 is x = -1.
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 8 from both sides:
- 3
Divide both sides by 2:
- 4
Check: put x = -1 back into the equation.
LaTeX source of the formulas on this page
\[ 2x + 8 = 6\ \Rightarrow\ x = -1 \]
\[ 2x + 8 = 6 \]
\[ 2x + 8 - 8 = 6 - 8 \ \Rightarrow\ 2x = -2 \]
\[ \frac{2x}{2} = \frac{-2}{2} \ \Rightarrow\ x = -1 \]
\[ 2\cdot(-1) + 8 = -2 + 8 = 6 \checkmark \]Trying values of x in 2x + 8 = 6
| x | 2x + 8 | Equals 6? |
|---|---|---|
| -3 | 2 | no |
| -2 | 4 | no |
| -1 | 6 | yes |
| 0 | 8 | no |
| 1 | 10 | no |
Questions
What is x in 2x + 8 = 6?
The solution of 2x + 8 = 6 is x = -1.
How do you solve 2x + 8 = 6?
Subtract 8 from both sides to get 2x = -2, then divide both sides by 2 to get x = -1.
How do I check the answer?
Replace x by -1: 2(-1) + 8 = 6, which is 6.