Question 388499
{{{A+B=8}}}
.
.
.
{{{10A+20B=16(8)}}}
{{{5A+10B=64}}}
Multiply eq. 1 by (-5) and add to eq. 2,
{{{-5A-5B+5A+10B=-40+64}}}
{{{5B=24}}}
{{{highlight(B=24/5)}}}quarts
Then from eq. 1,
{{{A+24/5=8}}}
{{{A=40/5-24/5}}}
{{{highlight(A=16/5)}}}quarts