Solve 10x + 7 = 177
The solution of 10x + 7 = 177 is x = 17.
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 7 from both sides:
- 3
Divide both sides by 10:
- 4
Check: put x = 17 back into the equation.
LaTeX source of the formulas on this page
\[ 10x + 7 = 177\ \Rightarrow\ x = 17 \]
\[ 10x + 7 = 177 \]
\[ 10x + 7 - 7 = 177 - 7 \ \Rightarrow\ 10x = 170 \]
\[ \frac{10x}{10} = \frac{170}{10} \ \Rightarrow\ x = 17 \]
\[ 10\cdot17 + 7 = 170 + 7 = 177 \checkmark \]Trying values of x in 10x + 7 = 177
| x | 10x + 7 | Equals 177? |
|---|---|---|
| 15 | 157 | no |
| 16 | 167 | no |
| 17 | 177 | yes |
| 18 | 187 | no |
| 19 | 197 | no |
Questions
What is x in 10x + 7 = 177?
The solution of 10x + 7 = 177 is x = 17.
How do you solve 10x + 7 = 177?
Subtract 7 from both sides to get 10x = 170, then divide both sides by 10 to get x = 17.
How do I check the answer?
Replace x by 17: 10(17) + 7 = 177, which is 177.