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22 June, 11:34

If y varies directly as x, and yequals=77 when xequals=66 , find y when xequals=1212.

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  1. 22 June, 11:54
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    If y varies directly as x ⇒y/x=k

    when y=77 and x=66⇒ y/x=77/66=7/6

    when x=1212 ⇒ y/1212=7/6

    y=1212*7/6=202*7

    y=1414
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