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Solve 12x + 3 = 159

The solution of 12x + 3 = 159 is x = 13.

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The lines y = 12x + 3 and y = 159 meet at x = 138101214161880100120140160180200220240x = 13y = 12x + 3y = 159
The lines y = 12x + 3 and y = 159 meet at x = 13. 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+3=15912x + 3 = 159
  2. 2

    Subtract 3 from both sides:

    12x+3−3=159−3 ⇒ 12x=15612x + 3 - 3 = 159 - 3 \ \Rightarrow\ 12x = 156
  3. 3

    Divide both sides by 12:

    12x12=15612 ⇒ x=13\frac{12x}{12} = \frac{156}{12} \ \Rightarrow\ x = 13
  4. 4

    Check: put x = 13 back into the equation.

    12⋅13+3=156+3=159✓12\cdot13 + 3 = 156 + 3 = 159 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 3 = 159\ \Rightarrow\ x = 13 \]
\[ 12x + 3 = 159 \]
\[ 12x + 3 - 3 = 159 - 3 \ \Rightarrow\ 12x = 156 \]
\[ \frac{12x}{12} = \frac{156}{12} \ \Rightarrow\ x = 13 \]
\[ 12\cdot13 + 3 = 156 + 3 = 159 \checkmark \]

Trying values of x in 12x + 3 = 159

x12x + 3Equals 159?
11135no
12147no
13159yes
14171no
15183no

Questions

What is x in 12x + 3 = 159?

The solution of 12x + 3 = 159 is x = 13.

How do you solve 12x + 3 = 159?

Subtract 3 from both sides to get 12x = 156, then divide both sides by 12 to get x = 13.

How do I check the answer?

Replace x by 13: 12(13) + 3 = 159, which is 159.

Similar equations

    Solve 12x + 3 = 159: x = 13 (steps and check) | WordGPT