Solve 11x + 8 = 107
The solution of 11x + 8 = 107 is x = 9.
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 11:
- 4
Check: put x = 9 back into the equation.
LaTeX source of the formulas on this page
\[ 11x + 8 = 107\ \Rightarrow\ x = 9 \]
\[ 11x + 8 = 107 \]
\[ 11x + 8 - 8 = 107 - 8 \ \Rightarrow\ 11x = 99 \]
\[ \frac{11x}{11} = \frac{99}{11} \ \Rightarrow\ x = 9 \]
\[ 11\cdot9 + 8 = 99 + 8 = 107 \checkmark \]Trying values of x in 11x + 8 = 107
| x | 11x + 8 | Equals 107? |
|---|---|---|
| 7 | 85 | no |
| 8 | 96 | no |
| 9 | 107 | yes |
| 10 | 118 | no |
| 11 | 129 | no |
Questions
What is x in 11x + 8 = 107?
The solution of 11x + 8 = 107 is x = 9.
How do you solve 11x + 8 = 107?
Subtract 8 from both sides to get 11x = 99, then divide both sides by 11 to get x = 9.
How do I check the answer?
Replace x by 9: 11(9) + 8 = 107, which is 107.