WordGPT

Solve 4x + 8 = 28

The solution of 4x + 8 = 28 is x = 5.

Explain it step by step in chatMake a short video of it
The lines y = 4x + 8 and y = 28 meet at x = 52468101020304050x = 5y = 4x + 8y = 28
The lines y = 4x + 8 and y = 28 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.

    4x+8=284x + 8 = 28
  2. 2

    Subtract 8 from both sides:

    4x+8−8=28−8 ⇒ 4x=204x + 8 - 8 = 28 - 8 \ \Rightarrow\ 4x = 20
  3. 3

    Divide both sides by 4:

    4x4=204 ⇒ x=5\frac{4x}{4} = \frac{20}{4} \ \Rightarrow\ x = 5
  4. 4

    Check: put x = 5 back into the equation.

    4⋅5+8=20+8=28✓4\cdot5 + 8 = 20 + 8 = 28 \checkmark
LaTeX source of the formulas on this page
\[ 4x + 8 = 28\ \Rightarrow\ x = 5 \]
\[ 4x + 8 = 28 \]
\[ 4x + 8 - 8 = 28 - 8 \ \Rightarrow\ 4x = 20 \]
\[ \frac{4x}{4} = \frac{20}{4} \ \Rightarrow\ x = 5 \]
\[ 4\cdot5 + 8 = 20 + 8 = 28 \checkmark \]

Trying values of x in 4x + 8 = 28

x4x + 8Equals 28?
320no
424no
528yes
632no
736no

Questions

What is x in 4x + 8 = 28?

The solution of 4x + 8 = 28 is x = 5.

How do you solve 4x + 8 = 28?

Subtract 8 from both sides to get 4x = 20, then divide both sides by 4 to get x = 5.

How do I check the answer?

Replace x by 5: 4(5) + 8 = 28, which is 28.

Similar equations

    Solve 4x + 8 = 28: x = 5 (steps and check) | WordGPT