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Solve 9x + 12 = 66

The solution of 9x + 12 = 66 is x = 6.

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The lines y = 9x + 12 and y = 66 meet at x = 62468101220406080100120x = 6y = 9x + 12y = 66
The lines y = 9x + 12 and y = 66 meet at x = 6. 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.

    9x+12=669x + 12 = 66
  2. 2

    Subtract 12 from both sides:

    9x+12−12=66−12 ⇒ 9x=549x + 12 - 12 = 66 - 12 \ \Rightarrow\ 9x = 54
  3. 3

    Divide both sides by 9:

    9x9=549 ⇒ x=6\frac{9x}{9} = \frac{54}{9} \ \Rightarrow\ x = 6
  4. 4

    Check: put x = 6 back into the equation.

    9⋅6+12=54+12=66✓9\cdot6 + 12 = 54 + 12 = 66 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 12 = 66\ \Rightarrow\ x = 6 \]
\[ 9x + 12 = 66 \]
\[ 9x + 12 - 12 = 66 - 12 \ \Rightarrow\ 9x = 54 \]
\[ \frac{9x}{9} = \frac{54}{9} \ \Rightarrow\ x = 6 \]
\[ 9\cdot6 + 12 = 54 + 12 = 66 \checkmark \]

Trying values of x in 9x + 12 = 66

x9x + 12Equals 66?
448no
557no
666yes
775no
884no

Questions

What is x in 9x + 12 = 66?

The solution of 9x + 12 = 66 is x = 6.

How do you solve 9x + 12 = 66?

Subtract 12 from both sides to get 9x = 54, then divide both sides by 9 to get x = 6.

How do I check the answer?

Replace x by 6: 9(6) + 12 = 66, which is 66.

Similar equations

    Solve 9x + 12 = 66: x = 6 (steps and check) | WordGPT