Question 97510
Always remember this identity:


If {{{a/b=c/d}}}, then {{{ad=bc}}}.


This method is often called 'cross multiplication'


Back to your problem,

{{{2/35=x/1575}}}


here, a=2, b=35, c=x, and d=1575. Thus,

{{{2*1575=35x}}}
{{{35x=2*1575}}}
{{{35x=3150}}}
{{{35x/35=3150/35}}}
{{{x=90}}}


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HyperBrain!