\[x-4=\frac{2}{1000}\]

1
Simplify  21000\frac{2}{1000}  to  1500\frac{1}{500}.
x4=1500x-4=\frac{1}{500}

2
Add 44 to both sides.
x=1500+4x=\frac{1}{500}+4

3
Simplify  1500+4\frac{1}{500}+4  to  2001500\frac{2001}{500}.
x=2001500x=\frac{2001}{500}

Done

Decimal Form: 4.002

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