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Solve 9x + 8 = 170

The solution of 9x + 8 = 170 is x = 18.

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The lines y = 9x + 8 and y = 170 meet at x = 1812141618202224120140160180200220x = 18y = 9x + 8y = 170
The lines y = 9x + 8 and y = 170 meet at x = 18. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

  1. 1

    The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.

    9x+8=1709x + 8 = 170
  2. 2

    Subtract 8 from both sides:

    9x+8−8=170−8 ⇒ 9x=1629x + 8 - 8 = 170 - 8 \ \Rightarrow\ 9x = 162
  3. 3

    Divide both sides by 9:

    9x9=1629 ⇒ x=18\frac{9x}{9} = \frac{162}{9} \ \Rightarrow\ x = 18
  4. 4

    Check: put x = 18 back into the equation.

    9⋅18+8=162+8=170✓9\cdot18 + 8 = 162 + 8 = 170 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 8 = 170\ \Rightarrow\ x = 18 \]
\[ 9x + 8 = 170 \]
\[ 9x + 8 - 8 = 170 - 8 \ \Rightarrow\ 9x = 162 \]
\[ \frac{9x}{9} = \frac{162}{9} \ \Rightarrow\ x = 18 \]
\[ 9\cdot18 + 8 = 162 + 8 = 170 \checkmark \]

Trying values of x in 9x + 8 = 170

x9x + 8Equals 170?
16152no
17161no
18170yes
19179no
20188no

Questions

What is x in 9x + 8 = 170?

The solution of 9x + 8 = 170 is x = 18.

How do you solve 9x + 8 = 170?

Subtract 8 from both sides to get 9x = 162, then divide both sides by 9 to get x = 18.

How do I check the answer?

Replace x by 18: 9(18) + 8 = 170, which is 170.

Similar equations

    Solve 9x + 8 = 170: x = 18 (steps and check) | WordGPT