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Solve 9x + 15 = 195

The solution of 9x + 15 = 195 is x = 20.

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The lines y = 9x + 15 and y = 195 meet at x = 2014161820222426140160180200220240260x = 20y = 9x + 15y = 195
The lines y = 9x + 15 and y = 195 meet at x = 20. 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=1959x + 15 = 195
  2. 2

    Subtract 15 from both sides:

    9x+15−15=195−15 ⇒ 9x=1809x + 15 - 15 = 195 - 15 \ \Rightarrow\ 9x = 180
  3. 3

    Divide both sides by 9:

    9x9=1809 ⇒ x=20\frac{9x}{9} = \frac{180}{9} \ \Rightarrow\ x = 20
  4. 4

    Check: put x = 20 back into the equation.

    9⋅20+15=180+15=195✓9\cdot20 + 15 = 180 + 15 = 195 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 15 = 195\ \Rightarrow\ x = 20 \]
\[ 9x + 15 = 195 \]
\[ 9x + 15 - 15 = 195 - 15 \ \Rightarrow\ 9x = 180 \]
\[ \frac{9x}{9} = \frac{180}{9} \ \Rightarrow\ x = 20 \]
\[ 9\cdot20 + 15 = 180 + 15 = 195 \checkmark \]

Trying values of x in 9x + 15 = 195

x9x + 15Equals 195?
18177no
19186no
20195yes
21204no
22213no

Questions

What is x in 9x + 15 = 195?

The solution of 9x + 15 = 195 is x = 20.

How do you solve 9x + 15 = 195?

Subtract 15 from both sides to get 9x = 180, then divide both sides by 9 to get x = 20.

How do I check the answer?

Replace x by 20: 9(20) + 15 = 195, which is 195.

Similar equations

    Solve 9x + 15 = 195: x = 20 (steps and check) | WordGPT