Question 12800
6x+28(4x-7)=9x
{{{6x+28*4x-28*7=9x}}}
{{{6x+112x-196=9x}}}
{{{6x+112x-9x=196}}}
{{{(6+112-9)x=196}}}
{{{109x=196}}}
{{{x=196/109}}}=1{{{87/109}}}

OK