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Solve 8x + 15 = 63

The solution of 8x + 15 = 63 is x = 6.

The lines y = 8x + 15 and y = 63 meet at x = 62468101220406080100120x = 6y = 8x + 15y = 63
The lines y = 8x + 15 and y = 63 meet at x = 6. 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.

    8x+15=638x + 15 = 63
  2. 2

    Subtract 15 from both sides:

    8x+15−15=63−15 ⇒ 8x=488x + 15 - 15 = 63 - 15 \ \Rightarrow\ 8x = 48
  3. 3

    Divide both sides by 8:

    8x8=488 ⇒ x=6\frac{8x}{8} = \frac{48}{8} \ \Rightarrow\ x = 6
  4. 4

    Check: put x = 6 back into the equation.

    8⋅6+15=48+15=63✓8\cdot6 + 15 = 48 + 15 = 63 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 15 = 63\ \Rightarrow\ x = 6 \]
\[ 8x + 15 = 63 \]
\[ 8x + 15 - 15 = 63 - 15 \ \Rightarrow\ 8x = 48 \]
\[ \frac{8x}{8} = \frac{48}{8} \ \Rightarrow\ x = 6 \]
\[ 8\cdot6 + 15 = 48 + 15 = 63 \checkmark \]

Trying values of x in 8x + 15 = 63

x8x + 15Equals 63?
447no
555no
663yes
771no
879no

Questions

What is x in 8x + 15 = 63?

The solution of 8x + 15 = 63 is x = 6.

How do you solve 8x + 15 = 63?

Subtract 15 from both sides to get 8x = 48, then divide both sides by 8 to get x = 6.

How do I check the answer?

Replace x by 6: 8(6) + 15 = 63, which is 63.

Similar equations

    Solve 8x + 15 = 63: x = 6 (steps and check) | WordGPT