4. The top eyeglass retailers last year were XrayVision, YesSpecs and ZoomGlasses. Together, they accounted for 69% of total

Question

4. The top eyeglass retailers last year were XrayVision, YesSpecs and ZoomGlasses. Together, they accounted for 69% of total market sales. The combined share of Xray Vision and YesSpecs was twice the share of ZoomGlasses, and the share of Xray Vision is less than the combined share of ZoomGlasses and YesSpecs by 55. 
What was the market share of each of the three companies? 
Xray Vision:  
YesSpecs: 
ZoomGlasses:

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