Question 854694
{{{A/B=7/5}}}
{{{5A=7B}}}
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{{{B/C=3/4}}}
{{{4B=3C}}}
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{{{4B=3(30)}}}
{{{B=90/4=45/2}}}
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{{{5A=7(45/2))}}}
{{{A=(7*9)/2}}}
{{{A=63/2}}}