Solve 2x + 3 = 29
The solution of 2x + 3 = 29 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 3 from both sides:
- 3
Divide both sides by 2:
- 4
Check: put x = 13 back into the equation.
LaTeX source of the formulas on this page
\[ 2x + 3 = 29\ \Rightarrow\ x = 13 \]
\[ 2x + 3 = 29 \]
\[ 2x + 3 - 3 = 29 - 3 \ \Rightarrow\ 2x = 26 \]
\[ \frac{2x}{2} = \frac{26}{2} \ \Rightarrow\ x = 13 \]
\[ 2\cdot13 + 3 = 26 + 3 = 29 \checkmark \]Trying values of x in 2x + 3 = 29
| x | 2x + 3 | Equals 29? |
|---|---|---|
| 11 | 25 | no |
| 12 | 27 | no |
| 13 | 29 | yes |
| 14 | 31 | no |
| 15 | 33 | no |
Questions
What is x in 2x + 3 = 29?
The solution of 2x + 3 = 29 is x = 13.
How do you solve 2x + 3 = 29?
Subtract 3 from both sides to get 2x = 26, then divide both sides by 2 to get x = 13.
How do I check the answer?
Replace x by 13: 2(13) + 3 = 29, which is 29.