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Solve 9x + 15 = 186

The solution of 9x + 15 = 186 is x = 19.

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The lines y = 9x + 15 and y = 186 meet at x = 19141618202224140160180200220240x = 19y = 9x + 15y = 186
The lines y = 9x + 15 and y = 186 meet at x = 19. 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=1869x + 15 = 186
  2. 2

    Subtract 15 from both sides:

    9x+15−15=186−15 ⇒ 9x=1719x + 15 - 15 = 186 - 15 \ \Rightarrow\ 9x = 171
  3. 3

    Divide both sides by 9:

    9x9=1719 ⇒ x=19\frac{9x}{9} = \frac{171}{9} \ \Rightarrow\ x = 19
  4. 4

    Check: put x = 19 back into the equation.

    9⋅19+15=171+15=186✓9\cdot19 + 15 = 171 + 15 = 186 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 15 = 186\ \Rightarrow\ x = 19 \]
\[ 9x + 15 = 186 \]
\[ 9x + 15 - 15 = 186 - 15 \ \Rightarrow\ 9x = 171 \]
\[ \frac{9x}{9} = \frac{171}{9} \ \Rightarrow\ x = 19 \]
\[ 9\cdot19 + 15 = 171 + 15 = 186 \checkmark \]

Trying values of x in 9x + 15 = 186

x9x + 15Equals 186?
17168no
18177no
19186yes
20195no
21204no

Questions

What is x in 9x + 15 = 186?

The solution of 9x + 15 = 186 is x = 19.

How do you solve 9x + 15 = 186?

Subtract 15 from both sides to get 9x = 171, then divide both sides by 9 to get x = 19.

How do I check the answer?

Replace x by 19: 9(19) + 15 = 186, which is 186.

Similar equations

    Solve 9x + 15 = 186: x = 19 (steps and check) | WordGPT