Question 383848
w/9-w/21=1/9
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{{{(w/9)-(w/21)=1/9}}}
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{{{(21w-9w)/(21*9)=1/9}}}
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{{{(12w)/(21*9)= 1/9}}}
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multiply by 9
{{{(12w*9)/(21*9)= 1*9/9}}}
{{{12w/21}}}=1
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multiply by 21
12w=21
/12
w= 21/12
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