WordGPT

Solve 12x + 7 = 139

The solution of 12x + 7 = 139 is x = 11.

Explain it step by step in chatMake a short video of it
The lines y = 12x + 7 and y = 139 meet at x = 1168101214166080100120140160180200220x = 11y = 12x + 7y = 139
The lines y = 12x + 7 and y = 139 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+7=13912x + 7 = 139
  2. 2

    Subtract 7 from both sides:

    12x+7−7=139−7 ⇒ 12x=13212x + 7 - 7 = 139 - 7 \ \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+7=132+7=139✓12\cdot11 + 7 = 132 + 7 = 139 \checkmark
LaTeX source of the formulas on this page
\[ 12x + 7 = 139\ \Rightarrow\ x = 11 \]
\[ 12x + 7 = 139 \]
\[ 12x + 7 - 7 = 139 - 7 \ \Rightarrow\ 12x = 132 \]
\[ \frac{12x}{12} = \frac{132}{12} \ \Rightarrow\ x = 11 \]
\[ 12\cdot11 + 7 = 132 + 7 = 139 \checkmark \]

Trying values of x in 12x + 7 = 139

x12x + 7Equals 139?
9115no
10127no
11139yes
12151no
13163no

Questions

What is x in 12x + 7 = 139?

The solution of 12x + 7 = 139 is x = 11.

How do you solve 12x + 7 = 139?

Subtract 7 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) + 7 = 139, which is 139.

Similar equations

    Solve 12x + 7 = 139: x = 11 (steps and check) | WordGPT