Solve 5x + 11 = 76
The solution of 5x + 11 = 76 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 5:
- 4
Check: put x = 13 back into the equation.
LaTeX source of the formulas on this page
\[ 5x + 11 = 76\ \Rightarrow\ x = 13 \]
\[ 5x + 11 = 76 \]
\[ 5x + 11 - 11 = 76 - 11 \ \Rightarrow\ 5x = 65 \]
\[ \frac{5x}{5} = \frac{65}{5} \ \Rightarrow\ x = 13 \]
\[ 5\cdot13 + 11 = 65 + 11 = 76 \checkmark \]Trying values of x in 5x + 11 = 76
| x | 5x + 11 | Equals 76? |
|---|---|---|
| 11 | 66 | no |
| 12 | 71 | no |
| 13 | 76 | yes |
| 14 | 81 | no |
| 15 | 86 | no |
Questions
What is x in 5x + 11 = 76?
The solution of 5x + 11 = 76 is x = 13.
How do you solve 5x + 11 = 76?
Subtract 11 from both sides to get 5x = 65, then divide both sides by 5 to get x = 13.
How do I check the answer?
Replace x by 13: 5(13) + 11 = 76, which is 76.