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Solve 8x + 5 = 69

The solution of 8x + 5 = 69 is x = 8.

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The lines y = 8x + 5 and y = 69 meet at x = 8246810121420406080100120x = 8y = 8x + 5y = 69
The lines y = 8x + 5 and y = 69 meet at x = 8. 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+5=698x + 5 = 69
  2. 2

    Subtract 5 from both sides:

    8x+5−5=69−5 ⇒ 8x=648x + 5 - 5 = 69 - 5 \ \Rightarrow\ 8x = 64
  3. 3

    Divide both sides by 8:

    8x8=648 ⇒ x=8\frac{8x}{8} = \frac{64}{8} \ \Rightarrow\ x = 8
  4. 4

    Check: put x = 8 back into the equation.

    8⋅8+5=64+5=69✓8\cdot8 + 5 = 64 + 5 = 69 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 5 = 69\ \Rightarrow\ x = 8 \]
\[ 8x + 5 = 69 \]
\[ 8x + 5 - 5 = 69 - 5 \ \Rightarrow\ 8x = 64 \]
\[ \frac{8x}{8} = \frac{64}{8} \ \Rightarrow\ x = 8 \]
\[ 8\cdot8 + 5 = 64 + 5 = 69 \checkmark \]

Trying values of x in 8x + 5 = 69

x8x + 5Equals 69?
653no
761no
869yes
977no
1085no

Questions

What is x in 8x + 5 = 69?

The solution of 8x + 5 = 69 is x = 8.

How do you solve 8x + 5 = 69?

Subtract 5 from both sides to get 8x = 64, then divide both sides by 8 to get x = 8.

How do I check the answer?

Replace x by 8: 8(8) + 5 = 69, which is 69.

Similar equations

    Solve 8x + 5 = 69: x = 8 (steps and check) | WordGPT