Solve 5x + 14 = 84
The solution of 5x + 14 = 84 is x = 14.
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 14 from both sides:
- 3
Divide both sides by 5:
- 4
Check: put x = 14 back into the equation.
LaTeX source of the formulas on this page
\[ 5x + 14 = 84\ \Rightarrow\ x = 14 \]
\[ 5x + 14 = 84 \]
\[ 5x + 14 - 14 = 84 - 14 \ \Rightarrow\ 5x = 70 \]
\[ \frac{5x}{5} = \frac{70}{5} \ \Rightarrow\ x = 14 \]
\[ 5\cdot14 + 14 = 70 + 14 = 84 \checkmark \]Trying values of x in 5x + 14 = 84
| x | 5x + 14 | Equals 84? |
|---|---|---|
| 12 | 74 | no |
| 13 | 79 | no |
| 14 | 84 | yes |
| 15 | 89 | no |
| 16 | 94 | no |
Questions
What is x in 5x + 14 = 84?
The solution of 5x + 14 = 84 is x = 14.
How do you solve 5x + 14 = 84?
Subtract 14 from both sides to get 5x = 70, then divide both sides by 5 to get x = 14.
How do I check the answer?
Replace x by 14: 5(14) + 14 = 84, which is 84.