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Solve 9x + 15 = 177

The solution of 9x + 15 = 177 is x = 18.

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The lines y = 9x + 15 and y = 177 meet at x = 1812141618202224120140160180200220240x = 18y = 9x + 15y = 177
The lines y = 9x + 15 and y = 177 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+15=1779x + 15 = 177
  2. 2

    Subtract 15 from both sides:

    9x+15−15=177−15 ⇒ 9x=1629x + 15 - 15 = 177 - 15 \ \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+15=162+15=177✓9\cdot18 + 15 = 162 + 15 = 177 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 15 = 177\ \Rightarrow\ x = 18 \]
\[ 9x + 15 = 177 \]
\[ 9x + 15 - 15 = 177 - 15 \ \Rightarrow\ 9x = 162 \]
\[ \frac{9x}{9} = \frac{162}{9} \ \Rightarrow\ x = 18 \]
\[ 9\cdot18 + 15 = 162 + 15 = 177 \checkmark \]

Trying values of x in 9x + 15 = 177

x9x + 15Equals 177?
16159no
17168no
18177yes
19186no
20195no

Questions

What is x in 9x + 15 = 177?

The solution of 9x + 15 = 177 is x = 18.

How do you solve 9x + 15 = 177?

Subtract 15 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) + 15 = 177, which is 177.

Similar equations

    Solve 9x + 15 = 177: x = 18 (steps and check) | WordGPT