Question 35358
{{{4x/5=2x/7}}} 
{{{(4x/5)5=(2x/7)5}}}
{{{(4x)7=(10x/7)7}}}
{{{28x=10x}}}
{{{28x-10x=0}}}
{{{18x=0}}}
{{{18x/18=0/18}}}
{{{x=0}}}
Check
{{{(4(0))/5=(2(0))/7=0/5=0/7=0=0}}}

Hope this helps,
lyra