Solve 5x + 2 = 22
The solution of 5x + 2 = 22 is x = 4.
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 2 from both sides:
- 3
Divide both sides by 5:
- 4
Check: put x = 4 back into the equation.
LaTeX source of the formulas on this page
\[ 5x + 2 = 22\ \Rightarrow\ x = 4 \]
\[ 5x + 2 = 22 \]
\[ 5x + 2 - 2 = 22 - 2 \ \Rightarrow\ 5x = 20 \]
\[ \frac{5x}{5} = \frac{20}{5} \ \Rightarrow\ x = 4 \]
\[ 5\cdot4 + 2 = 20 + 2 = 22 \checkmark \]Trying values of x in 5x + 2 = 22
| x | 5x + 2 | Equals 22? |
|---|---|---|
| 2 | 12 | no |
| 3 | 17 | no |
| 4 | 22 | yes |
| 5 | 27 | no |
| 6 | 32 | no |
Questions
What is x in 5x + 2 = 22?
The solution of 5x + 2 = 22 is x = 4.
How do you solve 5x + 2 = 22?
Subtract 2 from both sides to get 5x = 20, then divide both sides by 5 to get x = 4.
How do I check the answer?
Replace x by 4: 5(4) + 2 = 22, which is 22.