Question 1208201
C, volume of cubic container
1400+C cubic centimeters, capacity of fish tank


{{{(3/5)C}}} was {{{(1/4)(1400+C)}}};
Meaning
{{{(3/5)C=(1400+C)/4}}}



{{{12C=5(C+1400)}}}
{{{12C=5C+5*1400}}}
{{{7C=5*1400}}}
{{{C=5*200}}}

{{{highlight(C=1000)}}}