Solve 7x + 5 = 110
The solution of 7x + 5 = 110 is x = 15.
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 5 from both sides:
- 3
Divide both sides by 7:
- 4
Check: put x = 15 back into the equation.
LaTeX source of the formulas on this page
\[ 7x + 5 = 110\ \Rightarrow\ x = 15 \]
\[ 7x + 5 = 110 \]
\[ 7x + 5 - 5 = 110 - 5 \ \Rightarrow\ 7x = 105 \]
\[ \frac{7x}{7} = \frac{105}{7} \ \Rightarrow\ x = 15 \]
\[ 7\cdot15 + 5 = 105 + 5 = 110 \checkmark \]Trying values of x in 7x + 5 = 110
| x | 7x + 5 | Equals 110? |
|---|---|---|
| 13 | 96 | no |
| 14 | 103 | no |
| 15 | 110 | yes |
| 16 | 117 | no |
| 17 | 124 | no |
Questions
What is x in 7x + 5 = 110?
The solution of 7x + 5 = 110 is x = 15.
How do you solve 7x + 5 = 110?
Subtract 5 from both sides to get 7x = 105, then divide both sides by 7 to get x = 15.
How do I check the answer?
Replace x by 15: 7(15) + 5 = 110, which is 110.