Question 902851
Multiply the first equation by 2.
{{{6a-4b+8=0}}}
Multiply the second equation by (-3).
{{{-6a+15b+3=0}}}
Add them together to eliminate {{{a}}}.
{{{6a-4b+8-6a+15b+3=0}}}
{{{11b+11=0}}}
{{{11b=-11}}}
{{{b=-1}}}
Then use either equation to solve for {{{b}}},
{{{6a-4(-1)+8=0}}}
{{{6a+4+8=0}}}
{{{6a+12=0}}}
{{{6a=-12}}}
{{{a=-2}}}