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Solve 3x + 3 = 24

The solution of 3x + 3 = 24 is x = 7.

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The lines y = 3x + 3 and y = 24 meet at x = 72468101251015202530354045x = 7y = 3x + 3y = 24
The lines y = 3x + 3 and y = 24 meet at x = 7. 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.

    3x+3=243x + 3 = 24
  2. 2

    Subtract 3 from both sides:

    3x+3−3=24−3 ⇒ 3x=213x + 3 - 3 = 24 - 3 \ \Rightarrow\ 3x = 21
  3. 3

    Divide both sides by 3:

    3x3=213 ⇒ x=7\frac{3x}{3} = \frac{21}{3} \ \Rightarrow\ x = 7
  4. 4

    Check: put x = 7 back into the equation.

    3⋅7+3=21+3=24✓3\cdot7 + 3 = 21 + 3 = 24 \checkmark
LaTeX source of the formulas on this page
\[ 3x + 3 = 24\ \Rightarrow\ x = 7 \]
\[ 3x + 3 = 24 \]
\[ 3x + 3 - 3 = 24 - 3 \ \Rightarrow\ 3x = 21 \]
\[ \frac{3x}{3} = \frac{21}{3} \ \Rightarrow\ x = 7 \]
\[ 3\cdot7 + 3 = 21 + 3 = 24 \checkmark \]

Trying values of x in 3x + 3 = 24

x3x + 3Equals 24?
518no
621no
724yes
827no
930no

Questions

What is x in 3x + 3 = 24?

The solution of 3x + 3 = 24 is x = 7.

How do you solve 3x + 3 = 24?

Subtract 3 from both sides to get 3x = 21, then divide both sides by 3 to get x = 7.

How do I check the answer?

Replace x by 7: 3(7) + 3 = 24, which is 24.

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    Solve 3x + 3 = 24: x = 7 (steps and check) | WordGPT