Solve 4x + 13 = 29
The solution of 4x + 13 = 29 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 13 from both sides:
- 3
Divide both sides by 4:
- 4
Check: put x = 4 back into the equation.
LaTeX source of the formulas on this page
\[ 4x + 13 = 29\ \Rightarrow\ x = 4 \]
\[ 4x + 13 = 29 \]
\[ 4x + 13 - 13 = 29 - 13 \ \Rightarrow\ 4x = 16 \]
\[ \frac{4x}{4} = \frac{16}{4} \ \Rightarrow\ x = 4 \]
\[ 4\cdot4 + 13 = 16 + 13 = 29 \checkmark \]Trying values of x in 4x + 13 = 29
| x | 4x + 13 | Equals 29? |
|---|---|---|
| 2 | 21 | no |
| 3 | 25 | no |
| 4 | 29 | yes |
| 5 | 33 | no |
| 6 | 37 | no |
Questions
What is x in 4x + 13 = 29?
The solution of 4x + 13 = 29 is x = 4.
How do you solve 4x + 13 = 29?
Subtract 13 from both sides to get 4x = 16, then divide both sides by 4 to get x = 4.
How do I check the answer?
Replace x by 4: 4(4) + 13 = 29, which is 29.