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Solve 4x + 9 = 73

The solution of 4x + 9 = 73 is x = 16.

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The lines y = 4x + 9 and y = 73 meet at x = 16101214161820225060708090100x = 16y = 4x + 9y = 73
The lines y = 4x + 9 and y = 73 meet at x = 16. 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.

    4x+9=734x + 9 = 73
  2. 2

    Subtract 9 from both sides:

    4x+9−9=73−9 ⇒ 4x=644x + 9 - 9 = 73 - 9 \ \Rightarrow\ 4x = 64
  3. 3

    Divide both sides by 4:

    4x4=644 ⇒ x=16\frac{4x}{4} = \frac{64}{4} \ \Rightarrow\ x = 16
  4. 4

    Check: put x = 16 back into the equation.

    4⋅16+9=64+9=73✓4\cdot16 + 9 = 64 + 9 = 73 \checkmark
LaTeX source of the formulas on this page
\[ 4x + 9 = 73\ \Rightarrow\ x = 16 \]
\[ 4x + 9 = 73 \]
\[ 4x + 9 - 9 = 73 - 9 \ \Rightarrow\ 4x = 64 \]
\[ \frac{4x}{4} = \frac{64}{4} \ \Rightarrow\ x = 16 \]
\[ 4\cdot16 + 9 = 64 + 9 = 73 \checkmark \]

Trying values of x in 4x + 9 = 73

x4x + 9Equals 73?
1465no
1569no
1673yes
1777no
1881no

Questions

What is x in 4x + 9 = 73?

The solution of 4x + 9 = 73 is x = 16.

How do you solve 4x + 9 = 73?

Subtract 9 from both sides to get 4x = 64, then divide both sides by 4 to get x = 16.

How do I check the answer?

Replace x by 16: 4(16) + 9 = 73, which is 73.

Similar equations

    Solve 4x + 9 = 73: x = 16 (steps and check) | WordGPT