28.5=20[60/2-5+x/20x10
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Step-by-step explanation:
28.5=20[60/2-5+x/20x10
28.5=20[30-5+x/2]
28.5=20[(25+x/2) ]
28.5=20[(50+x) /2]
28.5=10(50+x)
2.85=x+50
x=2.85-50
x=47.15
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