4/x=0.2/1.

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4/x=0.2/1.4/x=0.2/1.4/x=0.2/1.4×1.5=0.2X6=0.2XX=304/x=0.2/1.54x1.5=0.2x6=0.2xX=30X=4*1.5/0.2X=30

4/x=0.2/1.
4/x=0.2/1.

4/x=0.2/1.
4×1.5=0.2X
6=0.2X
X=30

4/x=0.2/1.5
4x1.5=0.2x
6=0.2x
X=30

X=4*1.5/0.2
X=30