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Solve 9x + 9 = 54

The solution of 9x + 9 = 54 is x = 5.

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The lines y = 9x + 9 and y = 54 meet at x = 524681020406080100x = 5y = 9x + 9y = 54
The lines y = 9x + 9 and y = 54 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+9=549x + 9 = 54
  2. 2

    Subtract 9 from both sides:

    9x+9−9=54−9 ⇒ 9x=459x + 9 - 9 = 54 - 9 \ \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+9=45+9=54✓9\cdot5 + 9 = 45 + 9 = 54 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 9 = 54\ \Rightarrow\ x = 5 \]
\[ 9x + 9 = 54 \]
\[ 9x + 9 - 9 = 54 - 9 \ \Rightarrow\ 9x = 45 \]
\[ \frac{9x}{9} = \frac{45}{9} \ \Rightarrow\ x = 5 \]
\[ 9\cdot5 + 9 = 45 + 9 = 54 \checkmark \]

Trying values of x in 9x + 9 = 54

x9x + 9Equals 54?
336no
445no
554yes
663no
772no

Questions

What is x in 9x + 9 = 54?

The solution of 9x + 9 = 54 is x = 5.

How do you solve 9x + 9 = 54?

Subtract 9 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) + 9 = 54, which is 54.

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    Solve 9x + 9 = 54: x = 5 (steps and check) | WordGPT