5.2X-9/2X=6.44

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5.2X-9/2X=6.445.2X-9/2X=6.445.2X-9/2X=6.445.2X-9/2X=6.445.2x-4.5x=6.440.7x=6.44x=9.2

5.2X-9/2X=6.44
5.2X-9/2X=6.44

5.2X-9/2X=6.44
5.2X-9/2X=6.44
5.2x-4.5x=6.44
0.7x=6.44
x=9.2