WordGPT

Solve 12x + 15 = 39

The solution of 12x + 15 = 39 is x = 2.

Explain it step by step in chatMake a short video of it
The lines y = 12x + 15 and y = 39 meet at x = 2-4-22468-40-2020406080100120x = 2y = 12x + 15y = 39
The lines y = 12x + 15 and y = 39 meet at x = 2. 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=3912x + 15 = 39
  2. 2

    Subtract 15 from both sides:

    12x+15−15=39−15 ⇒ 12x=2412x + 15 - 15 = 39 - 15 \ \Rightarrow\ 12x = 24
  3. 3

    Divide both sides by 12:

    12x12=2412 ⇒ x=2\frac{12x}{12} = \frac{24}{12} \ \Rightarrow\ x = 2
  4. 4

    Check: put x = 2 back into the equation.

    12⋅2+15=24+15=39✓12\cdot2 + 15 = 24 + 15 = 39 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 15 = 39\ \Rightarrow\ x = 2 \]
\[ 12x + 15 = 39 \]
\[ 12x + 15 - 15 = 39 - 15 \ \Rightarrow\ 12x = 24 \]
\[ \frac{12x}{12} = \frac{24}{12} \ \Rightarrow\ x = 2 \]
\[ 12\cdot2 + 15 = 24 + 15 = 39 \checkmark \]

Trying values of x in 12x + 15 = 39

x12x + 15Equals 39?
015no
127no
239yes
351no
463no

Questions

What is x in 12x + 15 = 39?

The solution of 12x + 15 = 39 is x = 2.

How do you solve 12x + 15 = 39?

Subtract 15 from both sides to get 12x = 24, then divide both sides by 12 to get x = 2.

How do I check the answer?

Replace x by 2: 12(2) + 15 = 39, which is 39.

Similar equations

    Solve 12x + 15 = 39: x = 2 (steps and check) | WordGPT