Question 301715
1.{{{4x-3y=3}}}
2.{{{2x+5y=21}}}
Multiply eq. 2 by -2 and add to eq. 1,
{{{4x-3y-4x-10y=3-42}}}
{{{-13y=-39}}}
{{{highlight_green( y=3)}}}
Then use either equation to solve for x,
{{{2x+5y=21}}}
{{{2x+15=21}}}
{{{2x=6}}}
{{{highlight_green( x=3)}}}