\[2x-4=4\]

1
Add 44 to both sides.
2x=4+42x=4+4

2
Simplify  4+44+4  to  88.
2x=82x=8

3
Divide both sides by 22.
x=82x=\frac{8}{2}

4
Simplify  82\frac{8}{2}  to  44.
x=4x=4

Done

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