Solve 6x + 11 = 89
The solution of 6x + 11 = 89 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 11 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
\[ 6x + 11 = 89\ \Rightarrow\ x = 13 \]
\[ 6x + 11 = 89 \]
\[ 6x + 11 - 11 = 89 - 11 \ \Rightarrow\ 6x = 78 \]
\[ \frac{6x}{6} = \frac{78}{6} \ \Rightarrow\ x = 13 \]
\[ 6\cdot13 + 11 = 78 + 11 = 89 \checkmark \]Trying values of x in 6x + 11 = 89
| x | 6x + 11 | Equals 89? |
|---|---|---|
| 11 | 77 | no |
| 12 | 83 | no |
| 13 | 89 | yes |
| 14 | 95 | no |
| 15 | 101 | no |
Questions
What is x in 6x + 11 = 89?
The solution of 6x + 11 = 89 is x = 13.
How do you solve 6x + 11 = 89?
Subtract 11 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) + 11 = 89, which is 89.