WordGPT

Solve 9x + 9 = 45

The solution of 9x + 9 = 45 is x = 4.

Explain it step by step in chatMake a short video of it
The lines y = 9x + 9 and y = 45 meet at x = 4-2246810-2020406080100x = 4y = 9x + 9y = 45
The lines y = 9x + 9 and y = 45 meet at x = 4. 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=459x + 9 = 45
  2. 2

    Subtract 9 from both sides:

    9x+9−9=45−9 ⇒ 9x=369x + 9 - 9 = 45 - 9 \ \Rightarrow\ 9x = 36
  3. 3

    Divide both sides by 9:

    9x9=369 ⇒ x=4\frac{9x}{9} = \frac{36}{9} \ \Rightarrow\ x = 4
  4. 4

    Check: put x = 4 back into the equation.

    9⋅4+9=36+9=45✓9\cdot4 + 9 = 36 + 9 = 45 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 9 = 45\ \Rightarrow\ x = 4 \]
\[ 9x + 9 = 45 \]
\[ 9x + 9 - 9 = 45 - 9 \ \Rightarrow\ 9x = 36 \]
\[ \frac{9x}{9} = \frac{36}{9} \ \Rightarrow\ x = 4 \]
\[ 9\cdot4 + 9 = 36 + 9 = 45 \checkmark \]

Trying values of x in 9x + 9 = 45

x9x + 9Equals 45?
227no
336no
445yes
554no
663no

Questions

What is x in 9x + 9 = 45?

The solution of 9x + 9 = 45 is x = 4.

How do you solve 9x + 9 = 45?

Subtract 9 from both sides to get 9x = 36, then divide both sides by 9 to get x = 4.

How do I check the answer?

Replace x by 4: 9(4) + 9 = 45, which is 45.

Similar equations

    Solve 9x + 9 = 45: x = 4 (steps and check) | WordGPT