Solve 4x − 4 = 0

The solution of 4x − 4 = 0 is x = 1.

4x - 4 = 0\ \Rightarrow\ x = 1

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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
The goal is to get x alone. Undo the operations in the opposite order: first the subtraction, then the multiplication.
$4x - 4 = 0$
2
Add 4 to both sides:
$4x - 4 + 4 = 0 + 4 \ \Rightarrow\ 4x = 4$
3
Divide both sides by 4:
$\frac{4x}{4} = \frac{4}{4} \ \Rightarrow\ x = 1$
4
Check: put x = 1 back into the equation.
$4\cdot1 - 4 = 4 - 4 = 0 \checkmark$

LaTeX source of the formulas on this page

\[ 4x - 4 = 0\ \Rightarrow\ x = 1 \]
\[ 4x - 4 = 0 \]
\[ 4x - 4 + 4 = 0 + 4 \ \Rightarrow\ 4x = 4 \]
\[ \frac{4x}{4} = \frac{4}{4} \ \Rightarrow\ x = 1 \]
\[ 4\cdot1 - 4 = 4 - 4 = 0 \checkmark \]

Trying values of x in 4x − 4 = 0

x	4x − 4	Equals 0?
-1	-8	no
0	-4	no
1	0	yes
2	4	no
3	8	no

Questions

What is x in 4x − 4 = 0?

The solution of 4x − 4 = 0 is x = 1.

How do you solve 4x − 4 = 0?

Add 4 to 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.

Solve 4x − 4 = 0

How to work it out

Trying values of x in 4x − 4 = 0

Questions

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