Solve 6x + 8 = 98
The solution of 6x + 8 = 98 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 8 from both sides:
- 3
Divide both sides by 6:
- 4
Check: put x = 15 back into the equation.
LaTeX source of the formulas on this page
\[ 6x + 8 = 98\ \Rightarrow\ x = 15 \]
\[ 6x + 8 = 98 \]
\[ 6x + 8 - 8 = 98 - 8 \ \Rightarrow\ 6x = 90 \]
\[ \frac{6x}{6} = \frac{90}{6} \ \Rightarrow\ x = 15 \]
\[ 6\cdot15 + 8 = 90 + 8 = 98 \checkmark \]Trying values of x in 6x + 8 = 98
| x | 6x + 8 | Equals 98? |
|---|---|---|
| 13 | 86 | no |
| 14 | 92 | no |
| 15 | 98 | yes |
| 16 | 104 | no |
| 17 | 110 | no |
Questions
What is x in 6x + 8 = 98?
The solution of 6x + 8 = 98 is x = 15.
How do you solve 6x + 8 = 98?
Subtract 8 from both sides to get 6x = 90, then divide both sides by 6 to get x = 15.
How do I check the answer?
Replace x by 15: 6(15) + 8 = 98, which is 98.