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Solve 6x + 3 = 15

The solution of 6x + 3 = 15 is x = 2.

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The lines y = 6x + 3 and y = 15 meet at x = 2-4-22468-20-101020304050x = 2y = 6x + 3y = 15
The lines y = 6x + 3 and y = 15 meet at x = 2. 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.

    6x+3=156x + 3 = 15
  2. 2

    Subtract 3 from both sides:

    6x+3−3=15−3 ⇒ 6x=126x + 3 - 3 = 15 - 3 \ \Rightarrow\ 6x = 12
  3. 3

    Divide both sides by 6:

    6x6=126 ⇒ x=2\frac{6x}{6} = \frac{12}{6} \ \Rightarrow\ x = 2
  4. 4

    Check: put x = 2 back into the equation.

    6⋅2+3=12+3=15✓6\cdot2 + 3 = 12 + 3 = 15 \checkmark
LaTeX source of the formulas on this page
\[ 6x + 3 = 15\ \Rightarrow\ x = 2 \]
\[ 6x + 3 = 15 \]
\[ 6x + 3 - 3 = 15 - 3 \ \Rightarrow\ 6x = 12 \]
\[ \frac{6x}{6} = \frac{12}{6} \ \Rightarrow\ x = 2 \]
\[ 6\cdot2 + 3 = 12 + 3 = 15 \checkmark \]

Trying values of x in 6x + 3 = 15

x6x + 3Equals 15?
03no
19no
215yes
321no
427no

Questions

What is x in 6x + 3 = 15?

The solution of 6x + 3 = 15 is x = 2.

How do you solve 6x + 3 = 15?

Subtract 3 from both sides to get 6x = 12, then divide both sides by 6 to get x = 2.

How do I check the answer?

Replace x by 2: 6(2) + 3 = 15, which is 15.

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    Solve 6x + 3 = 15: x = 2 (steps and check) | WordGPT