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Solve 2x + 3 = 9

The solution of 2x + 3 = 9 is x = 3.

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The lines y = 2x + 3 and y = 9 meet at x = 3-22468-55101520x = 3y = 2x + 3y = 9
The lines y = 2x + 3 and y = 9 meet at x = 3. 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.

    2x+3=92x + 3 = 9
  2. 2

    Subtract 3 from both sides:

    2x+3−3=9−3 ⇒ 2x=62x + 3 - 3 = 9 - 3 \ \Rightarrow\ 2x = 6
  3. 3

    Divide both sides by 2:

    2x2=62 ⇒ x=3\frac{2x}{2} = \frac{6}{2} \ \Rightarrow\ x = 3
  4. 4

    Check: put x = 3 back into the equation.

    2⋅3+3=6+3=9✓2\cdot3 + 3 = 6 + 3 = 9 \checkmark
LaTeX source of the formulas on this page
\[ 2x + 3 = 9\ \Rightarrow\ x = 3 \]
\[ 2x + 3 = 9 \]
\[ 2x + 3 - 3 = 9 - 3 \ \Rightarrow\ 2x = 6 \]
\[ \frac{2x}{2} = \frac{6}{2} \ \Rightarrow\ x = 3 \]
\[ 2\cdot3 + 3 = 6 + 3 = 9 \checkmark \]

Trying values of x in 2x + 3 = 9

x2x + 3Equals 9?
15no
27no
39yes
411no
513no

Questions

What is x in 2x + 3 = 9?

The solution of 2x + 3 = 9 is x = 3.

How do you solve 2x + 3 = 9?

Subtract 3 from both sides to get 2x = 6, then divide both sides by 2 to get x = 3.

How do I check the answer?

Replace x by 3: 2(3) + 3 = 9, which is 9.

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    Solve 2x + 3 = 9: x = 3 (steps and check) | WordGPT