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Solve 12x + 8 = 80

The solution of 12x + 8 = 80 is x = 6.

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The lines y = 12x + 8 and y = 80 meet at x = 62468101220406080100120140160x = 6y = 12x + 8y = 80
The lines y = 12x + 8 and y = 80 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.

    12x+8=8012x + 8 = 80
  2. 2

    Subtract 8 from both sides:

    12x+8−8=80−8 ⇒ 12x=7212x + 8 - 8 = 80 - 8 \ \Rightarrow\ 12x = 72
  3. 3

    Divide both sides by 12:

    12x12=7212 ⇒ x=6\frac{12x}{12} = \frac{72}{12} \ \Rightarrow\ x = 6
  4. 4

    Check: put x = 6 back into the equation.

    12⋅6+8=72+8=80✓12\cdot6 + 8 = 72 + 8 = 80 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 8 = 80\ \Rightarrow\ x = 6 \]
\[ 12x + 8 = 80 \]
\[ 12x + 8 - 8 = 80 - 8 \ \Rightarrow\ 12x = 72 \]
\[ \frac{12x}{12} = \frac{72}{12} \ \Rightarrow\ x = 6 \]
\[ 12\cdot6 + 8 = 72 + 8 = 80 \checkmark \]

Trying values of x in 12x + 8 = 80

x12x + 8Equals 80?
456no
568no
680yes
792no
8104no

Questions

What is x in 12x + 8 = 80?

The solution of 12x + 8 = 80 is x = 6.

How do you solve 12x + 8 = 80?

Subtract 8 from both sides to get 12x = 72, then divide both sides by 12 to get x = 6.

How do I check the answer?

Replace x by 6: 12(6) + 8 = 80, which is 80.

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    Solve 12x + 8 = 80: x = 6 (steps and check) | WordGPT