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Solve 2x + 4 = 28

The solution of 2x + 4 = 28 is x = 12.

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The lines y = 2x + 4 and y = 28 meet at x = 12681012141618152025303540x = 12y = 2x + 4y = 28
The lines y = 2x + 4 and y = 28 meet at x = 12. 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.

    2x+4=282x + 4 = 28
  2. 2

    Subtract 4 from both sides:

    2x+4−4=28−4 ⇒ 2x=242x + 4 - 4 = 28 - 4 \ \Rightarrow\ 2x = 24
  3. 3

    Divide both sides by 2:

    2x2=242 ⇒ x=12\frac{2x}{2} = \frac{24}{2} \ \Rightarrow\ x = 12
  4. 4

    Check: put x = 12 back into the equation.

    2⋅12+4=24+4=28✓2\cdot12 + 4 = 24 + 4 = 28 \checkmark
LaTeX source of the formulas on this page
\[ 2x + 4 = 28\ \Rightarrow\ x = 12 \]
\[ 2x + 4 = 28 \]
\[ 2x + 4 - 4 = 28 - 4 \ \Rightarrow\ 2x = 24 \]
\[ \frac{2x}{2} = \frac{24}{2} \ \Rightarrow\ x = 12 \]
\[ 2\cdot12 + 4 = 24 + 4 = 28 \checkmark \]

Trying values of x in 2x + 4 = 28

x2x + 4Equals 28?
1024no
1126no
1228yes
1330no
1432no

Questions

What is x in 2x + 4 = 28?

The solution of 2x + 4 = 28 is x = 12.

How do you solve 2x + 4 = 28?

Subtract 4 from both sides to get 2x = 24, then divide both sides by 2 to get x = 12.

How do I check the answer?

Replace x by 12: 2(12) + 4 = 28, which is 28.

Similar equations

    Solve 2x + 4 = 28: x = 12 (steps and check) | WordGPT