WordGPT

Solve 8x + 15 = 55

The solution of 8x + 15 = 55 is x = 5.

Explain it step by step in chatMake a short video of it
The lines y = 8x + 15 and y = 55 meet at x = 524681020406080100x = 5y = 8x + 15y = 55
The lines y = 8x + 15 and y = 55 meet at x = 5. 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.

    8x+15=558x + 15 = 55
  2. 2

    Subtract 15 from both sides:

    8x+15−15=55−15 ⇒ 8x=408x + 15 - 15 = 55 - 15 \ \Rightarrow\ 8x = 40
  3. 3

    Divide both sides by 8:

    8x8=408 ⇒ x=5\frac{8x}{8} = \frac{40}{8} \ \Rightarrow\ x = 5
  4. 4

    Check: put x = 5 back into the equation.

    8⋅5+15=40+15=55✓8\cdot5 + 15 = 40 + 15 = 55 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 15 = 55\ \Rightarrow\ x = 5 \]
\[ 8x + 15 = 55 \]
\[ 8x + 15 - 15 = 55 - 15 \ \Rightarrow\ 8x = 40 \]
\[ \frac{8x}{8} = \frac{40}{8} \ \Rightarrow\ x = 5 \]
\[ 8\cdot5 + 15 = 40 + 15 = 55 \checkmark \]

Trying values of x in 8x + 15 = 55

x8x + 15Equals 55?
339no
447no
555yes
663no
771no

Questions

What is x in 8x + 15 = 55?

The solution of 8x + 15 = 55 is x = 5.

How do you solve 8x + 15 = 55?

Subtract 15 from both sides to get 8x = 40, then divide both sides by 8 to get x = 5.

How do I check the answer?

Replace x by 5: 8(5) + 15 = 55, which is 55.

Similar equations

    Solve 8x + 15 = 55: x = 5 (steps and check) | WordGPT