WordGPT

Solve 3x + 15 = 36

The solution of 3x + 15 = 36 is x = 7.

Explain it step by step in chatMake a short video of it
The lines y = 3x + 15 and y = 36 meet at x = 724681012152025303540455055x = 7y = 3x + 15y = 36
The lines y = 3x + 15 and y = 36 meet at x = 7. 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.

    3x+15=363x + 15 = 36
  2. 2

    Subtract 15 from both sides:

    3x+15−15=36−15 ⇒ 3x=213x + 15 - 15 = 36 - 15 \ \Rightarrow\ 3x = 21
  3. 3

    Divide both sides by 3:

    3x3=213 ⇒ x=7\frac{3x}{3} = \frac{21}{3} \ \Rightarrow\ x = 7
  4. 4

    Check: put x = 7 back into the equation.

    3⋅7+15=21+15=36✓3\cdot7 + 15 = 21 + 15 = 36 \checkmark
LaTeX source of the formulas on this page
\[ 3x + 15 = 36\ \Rightarrow\ x = 7 \]
\[ 3x + 15 = 36 \]
\[ 3x + 15 - 15 = 36 - 15 \ \Rightarrow\ 3x = 21 \]
\[ \frac{3x}{3} = \frac{21}{3} \ \Rightarrow\ x = 7 \]
\[ 3\cdot7 + 15 = 21 + 15 = 36 \checkmark \]

Trying values of x in 3x + 15 = 36

x3x + 15Equals 36?
530no
633no
736yes
839no
942no

Questions

What is x in 3x + 15 = 36?

The solution of 3x + 15 = 36 is x = 7.

How do you solve 3x + 15 = 36?

Subtract 15 from both sides to get 3x = 21, then divide both sides by 3 to get x = 7.

How do I check the answer?

Replace x by 7: 3(7) + 15 = 36, which is 36.

Similar equations

    Solve 3x + 15 = 36: x = 7 (steps and check) | WordGPT