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Solve 9x + 12 = 57

The solution of 9x + 12 = 57 is x = 5.

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The lines y = 9x + 12 and y = 57 meet at x = 524681020406080100120x = 5y = 9x + 12y = 57
The lines y = 9x + 12 and y = 57 meet at x = 5. 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=579x + 12 = 57
  2. 2

    Subtract 12 from both sides:

    9x+12−12=57−12 ⇒ 9x=459x + 12 - 12 = 57 - 12 \ \Rightarrow\ 9x = 45
  3. 3

    Divide both sides by 9:

    9x9=459 ⇒ x=5\frac{9x}{9} = \frac{45}{9} \ \Rightarrow\ x = 5
  4. 4

    Check: put x = 5 back into the equation.

    9⋅5+12=45+12=57✓9\cdot5 + 12 = 45 + 12 = 57 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 12 = 57\ \Rightarrow\ x = 5 \]
\[ 9x + 12 = 57 \]
\[ 9x + 12 - 12 = 57 - 12 \ \Rightarrow\ 9x = 45 \]
\[ \frac{9x}{9} = \frac{45}{9} \ \Rightarrow\ x = 5 \]
\[ 9\cdot5 + 12 = 45 + 12 = 57 \checkmark \]

Trying values of x in 9x + 12 = 57

x9x + 12Equals 57?
339no
448no
557yes
666no
775no

Questions

What is x in 9x + 12 = 57?

The solution of 9x + 12 = 57 is x = 5.

How do you solve 9x + 12 = 57?

Subtract 12 from both sides to get 9x = 45, then divide both sides by 9 to get x = 5.

How do I check the answer?

Replace x by 5: 9(5) + 12 = 57, which is 57.

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    Solve 9x + 12 = 57: x = 5 (steps and check) | WordGPT