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Solve 12x + 9 = 141

The solution of 12x + 9 = 141 is x = 11.

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The lines y = 12x + 9 and y = 141 meet at x = 1168101214166080100120140160180200220x = 11y = 12x + 9y = 141
The lines y = 12x + 9 and y = 141 meet at x = 11. 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+9=14112x + 9 = 141
  2. 2

    Subtract 9 from both sides:

    12x+9−9=141−9 ⇒ 12x=13212x + 9 - 9 = 141 - 9 \ \Rightarrow\ 12x = 132
  3. 3

    Divide both sides by 12:

    12x12=13212 ⇒ x=11\frac{12x}{12} = \frac{132}{12} \ \Rightarrow\ x = 11
  4. 4

    Check: put x = 11 back into the equation.

    12⋅11+9=132+9=141✓12\cdot11 + 9 = 132 + 9 = 141 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 9 = 141\ \Rightarrow\ x = 11 \]
\[ 12x + 9 = 141 \]
\[ 12x + 9 - 9 = 141 - 9 \ \Rightarrow\ 12x = 132 \]
\[ \frac{12x}{12} = \frac{132}{12} \ \Rightarrow\ x = 11 \]
\[ 12\cdot11 + 9 = 132 + 9 = 141 \checkmark \]

Trying values of x in 12x + 9 = 141

x12x + 9Equals 141?
9117no
10129no
11141yes
12153no
13165no

Questions

What is x in 12x + 9 = 141?

The solution of 12x + 9 = 141 is x = 11.

How do you solve 12x + 9 = 141?

Subtract 9 from both sides to get 12x = 132, then divide both sides by 12 to get x = 11.

How do I check the answer?

Replace x by 11: 12(11) + 9 = 141, which is 141.

Similar equations

    Solve 12x + 9 = 141: x = 11 (steps and check) | WordGPT