WordGPT

Solve 8x + 1 = 129

The solution of 8x + 1 = 129 is x = 16.

Explain it step by step in chatMake a short video of it
The lines y = 8x + 1 and y = 129 meet at x = 161012141618202280100120140160180x = 16y = 8x + 1y = 129
The lines y = 8x + 1 and y = 129 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.

    8x+1=1298x + 1 = 129
  2. 2

    Subtract 1 from both sides:

    8x+1−1=129−1 ⇒ 8x=1288x + 1 - 1 = 129 - 1 \ \Rightarrow\ 8x = 128
  3. 3

    Divide both sides by 8:

    8x8=1288 ⇒ x=16\frac{8x}{8} = \frac{128}{8} \ \Rightarrow\ x = 16
  4. 4

    Check: put x = 16 back into the equation.

    8⋅16+1=128+1=129✓8\cdot16 + 1 = 128 + 1 = 129 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 1 = 129\ \Rightarrow\ x = 16 \]
\[ 8x + 1 = 129 \]
\[ 8x + 1 - 1 = 129 - 1 \ \Rightarrow\ 8x = 128 \]
\[ \frac{8x}{8} = \frac{128}{8} \ \Rightarrow\ x = 16 \]
\[ 8\cdot16 + 1 = 128 + 1 = 129 \checkmark \]

Trying values of x in 8x + 1 = 129

x8x + 1Equals 129?
14113no
15121no
16129yes
17137no
18145no

Questions

What is x in 8x + 1 = 129?

The solution of 8x + 1 = 129 is x = 16.

How do you solve 8x + 1 = 129?

Subtract 1 from both sides to get 8x = 128, then divide both sides by 8 to get x = 16.

How do I check the answer?

Replace x by 16: 8(16) + 1 = 129, which is 129.

Similar equations

    Solve 8x + 1 = 129: x = 16 (steps and check) | WordGPT