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Solve 12x + 15 = 207

The solution of 12x + 15 = 207 is x = 16.

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The lines y = 12x + 15 and y = 207 meet at x = 1610121416182022140160180200220240260280x = 16y = 12x + 15y = 207
The lines y = 12x + 15 and y = 207 meet at x = 16. 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.

    12x+15=20712x + 15 = 207
  2. 2

    Subtract 15 from both sides:

    12x+15−15=207−15 ⇒ 12x=19212x + 15 - 15 = 207 - 15 \ \Rightarrow\ 12x = 192
  3. 3

    Divide both sides by 12:

    12x12=19212 ⇒ x=16\frac{12x}{12} = \frac{192}{12} \ \Rightarrow\ x = 16
  4. 4

    Check: put x = 16 back into the equation.

    12⋅16+15=192+15=207✓12\cdot16 + 15 = 192 + 15 = 207 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 15 = 207\ \Rightarrow\ x = 16 \]
\[ 12x + 15 = 207 \]
\[ 12x + 15 - 15 = 207 - 15 \ \Rightarrow\ 12x = 192 \]
\[ \frac{12x}{12} = \frac{192}{12} \ \Rightarrow\ x = 16 \]
\[ 12\cdot16 + 15 = 192 + 15 = 207 \checkmark \]

Trying values of x in 12x + 15 = 207

x12x + 15Equals 207?
14183no
15195no
16207yes
17219no
18231no

Questions

What is x in 12x + 15 = 207?

The solution of 12x + 15 = 207 is x = 16.

How do you solve 12x + 15 = 207?

Subtract 15 from both sides to get 12x = 192, then divide both sides by 12 to get x = 16.

How do I check the answer?

Replace x by 16: 12(16) + 15 = 207, which is 207.

Similar equations

    Solve 12x + 15 = 207: x = 16 (steps and check) | WordGPT