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Solve 8x + 8 = 0

The solution of 8x + 8 = 0 is x = -1.

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The lines y = 8x + 8 and y = 0 meet at x = -1-6-4-224-40-202040x = -1y = 8x + 8y = 0
The lines y = 8x + 8 and y = 0 meet at x = -1. 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+8=08x + 8 = 0
  2. 2

    Subtract 8 from both sides:

    8x+8āˆ’8=0āˆ’8Ā ā‡’Ā 8x=āˆ’88x + 8 - 8 = 0 - 8 \ \Rightarrow\ 8x = -8
  3. 3

    Divide both sides by 8:

    8x8=āˆ’88Ā ā‡’Ā x=āˆ’1\frac{8x}{8} = \frac{-8}{8} \ \Rightarrow\ x = -1
  4. 4

    Check: put x = -1 back into the equation.

    8ā‹…(āˆ’1)+8=āˆ’8+8=0āœ“8\cdot(-1) + 8 = -8 + 8 = 0 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 8 = 0\ \Rightarrow\ x = -1 \]
\[ 8x + 8 = 0 \]
\[ 8x + 8 - 8 = 0 - 8 \ \Rightarrow\ 8x = -8 \]
\[ \frac{8x}{8} = \frac{-8}{8} \ \Rightarrow\ x = -1 \]
\[ 8\cdot(-1) + 8 = -8 + 8 = 0 \checkmark \]

Trying values of x in 8x + 8 = 0

x8x + 8Equals 0?
-3-16no
-2-8no
-10yes
08no
116no

Questions

What is x in 8x + 8 = 0?

The solution of 8x + 8 = 0 is x = -1.

How do you solve 8x + 8 = 0?

Subtract 8 from both sides to get 8x = -8, then divide both sides by 8 to get x = -1.

How do I check the answer?

Replace x by -1: 8(-1) + 8 = 0, which is 0.

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    Solve 8x + 8 = 0: x = -1 (steps and check) | WordGPT