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Solve 12x + 12 = 72

The solution of 12x + 12 = 72 is x = 5.

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The lines y = 12x + 12 and y = 72 meet at x = 524681020406080100120140x = 5y = 12x + 12y = 72
The lines y = 12x + 12 and y = 72 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.

    12x+12=7212x + 12 = 72
  2. 2

    Subtract 12 from both sides:

    12x+12−12=72−12 ⇒ 12x=6012x + 12 - 12 = 72 - 12 \ \Rightarrow\ 12x = 60
  3. 3

    Divide both sides by 12:

    12x12=6012 ⇒ x=5\frac{12x}{12} = \frac{60}{12} \ \Rightarrow\ x = 5
  4. 4

    Check: put x = 5 back into the equation.

    12⋅5+12=60+12=72✓12\cdot5 + 12 = 60 + 12 = 72 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 12 = 72\ \Rightarrow\ x = 5 \]
\[ 12x + 12 = 72 \]
\[ 12x + 12 - 12 = 72 - 12 \ \Rightarrow\ 12x = 60 \]
\[ \frac{12x}{12} = \frac{60}{12} \ \Rightarrow\ x = 5 \]
\[ 12\cdot5 + 12 = 60 + 12 = 72 \checkmark \]

Trying values of x in 12x + 12 = 72

x12x + 12Equals 72?
348no
460no
572yes
684no
796no

Questions

What is x in 12x + 12 = 72?

The solution of 12x + 12 = 72 is x = 5.

How do you solve 12x + 12 = 72?

Subtract 12 from both sides to get 12x = 60, then divide both sides by 12 to get x = 5.

How do I check the answer?

Replace x by 5: 12(5) + 12 = 72, which is 72.

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    Solve 12x + 12 = 72: x = 5 (steps and check) | WordGPT