Question 661654
{{{x+y=3}}}

{{{2x+y=4 }}}


{{{ graph( 600, 600, -10, 10, -10, 10, -x+3, -2x+4) }}}

as we can see, intersection is at ({{{1}}},{{{2}}}); so, the solution is {{{x=1}}} and {{{y=2}}}

now we will check this solution:

{{{x+y=3}}}......plug in {{{x=1}}} and {{{y=2}}}

{{{1+2=3}}}

{{{3=3}}}.....{{{highlight(true)}}}


{{{2x+y=4 }}}

{{{2*1+2=4 }}}

{{{2+2=4 }}}


{{{4=4 }}}....{{{highlight(true)}}}

so, our solution is correct