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Solve 2x + 12 = 18

The solution of 2x + 12 = 18 is x = 3.

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The lines y = 2x + 12 and y = 18 meet at x = 3-2246851015202530x = 3y = 2x + 12y = 18
The lines y = 2x + 12 and y = 18 meet at x = 3. 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+12=182x + 12 = 18
  2. 2

    Subtract 12 from both sides:

    2x+12−12=18−12 ⇒ 2x=62x + 12 - 12 = 18 - 12 \ \Rightarrow\ 2x = 6
  3. 3

    Divide both sides by 2:

    2x2=62 ⇒ x=3\frac{2x}{2} = \frac{6}{2} \ \Rightarrow\ x = 3
  4. 4

    Check: put x = 3 back into the equation.

    2⋅3+12=6+12=18✓2\cdot3 + 12 = 6 + 12 = 18 \checkmark
LaTeX source of the formulas on this page
\[ 2x + 12 = 18\ \Rightarrow\ x = 3 \]
\[ 2x + 12 = 18 \]
\[ 2x + 12 - 12 = 18 - 12 \ \Rightarrow\ 2x = 6 \]
\[ \frac{2x}{2} = \frac{6}{2} \ \Rightarrow\ x = 3 \]
\[ 2\cdot3 + 12 = 6 + 12 = 18 \checkmark \]

Trying values of x in 2x + 12 = 18

x2x + 12Equals 18?
114no
216no
318yes
420no
522no

Questions

What is x in 2x + 12 = 18?

The solution of 2x + 12 = 18 is x = 3.

How do you solve 2x + 12 = 18?

Subtract 12 from both sides to get 2x = 6, then divide both sides by 2 to get x = 3.

How do I check the answer?

Replace x by 3: 2(3) + 12 = 18, which is 18.

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    Solve 2x + 12 = 18: x = 3 (steps and check) | WordGPT