Question 796834
Each bottle is filled to p of its capacity, and the sum of these must be 7 liters.
{{{4*p+6*p=7}}}
{{{p(4+6)=7}}}
{{{10p=7}}}
{{{highlight(p=7/10)}}}


Does {{{7/10}}} work?
{{{4(7/10)+6(7/10)}}}
{{{2.8+4.2}}}
{{{7.0}}}, yes.