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Solve 4x + 4 = 0

The solution of 4x + 4 = 0 is x = -1.

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The lines y = 4x + 4 and y = 0 meet at x = -1-6-4-224-20-101020x = -1y = 4x + 4y = 0
The lines y = 4x + 4 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.

    4x+4=04x + 4 = 0
  2. 2

    Subtract 4 from both sides:

    4x+4āˆ’4=0āˆ’4Ā ā‡’Ā 4x=āˆ’44x + 4 - 4 = 0 - 4 \ \Rightarrow\ 4x = -4
  3. 3

    Divide both sides by 4:

    4x4=āˆ’44Ā ā‡’Ā x=āˆ’1\frac{4x}{4} = \frac{-4}{4} \ \Rightarrow\ x = -1
  4. 4

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

    4ā‹…(āˆ’1)+4=āˆ’4+4=0āœ“4\cdot(-1) + 4 = -4 + 4 = 0 \checkmark
LaTeX source of the formulas on this page
\[ 4x + 4 = 0\ \Rightarrow\ x = -1 \]
\[ 4x + 4 = 0 \]
\[ 4x + 4 - 4 = 0 - 4 \ \Rightarrow\ 4x = -4 \]
\[ \frac{4x}{4} = \frac{-4}{4} \ \Rightarrow\ x = -1 \]
\[ 4\cdot(-1) + 4 = -4 + 4 = 0 \checkmark \]

Trying values of x in 4x + 4 = 0

x4x + 4Equals 0?
-3-8no
-2-4no
-10yes
04no
18no

Questions

What is x in 4x + 4 = 0?

The solution of 4x + 4 = 0 is x = -1.

How do you solve 4x + 4 = 0?

Subtract 4 from both sides to get 4x = -4, then divide both sides by 4 to get x = -1.

How do I check the answer?

Replace x by -1: 4(-1) + 4 = 0, which is 0.

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    Solve 4x + 4 = 0: x = -1 (steps and check) | WordGPT