WordGPT

Solve 4x + 8 = 80

The solution of 4x + 8 = 80 is x = 18.

Explain it step by step in chatMake a short video of it
The lines y = 4x + 8 and y = 80 meet at x = 181214161820222460708090100x = 18y = 4x + 8y = 80
The lines y = 4x + 8 and y = 80 meet at x = 18. 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.

    4x+8=804x + 8 = 80
  2. 2

    Subtract 8 from both sides:

    4x+8−8=80−8 ⇒ 4x=724x + 8 - 8 = 80 - 8 \ \Rightarrow\ 4x = 72
  3. 3

    Divide both sides by 4:

    4x4=724 ⇒ x=18\frac{4x}{4} = \frac{72}{4} \ \Rightarrow\ x = 18
  4. 4

    Check: put x = 18 back into the equation.

    4⋅18+8=72+8=80✓4\cdot18 + 8 = 72 + 8 = 80 \checkmark
LaTeX source of the formulas on this page
\[ 4x + 8 = 80\ \Rightarrow\ x = 18 \]
\[ 4x + 8 = 80 \]
\[ 4x + 8 - 8 = 80 - 8 \ \Rightarrow\ 4x = 72 \]
\[ \frac{4x}{4} = \frac{72}{4} \ \Rightarrow\ x = 18 \]
\[ 4\cdot18 + 8 = 72 + 8 = 80 \checkmark \]

Trying values of x in 4x + 8 = 80

x4x + 8Equals 80?
1672no
1776no
1880yes
1984no
2088no

Questions

What is x in 4x + 8 = 80?

The solution of 4x + 8 = 80 is x = 18.

How do you solve 4x + 8 = 80?

Subtract 8 from both sides to get 4x = 72, then divide both sides by 4 to get x = 18.

How do I check the answer?

Replace x by 18: 4(18) + 8 = 80, which is 80.

Similar equations

    Solve 4x + 8 = 80: x = 18 (steps and check) | WordGPT