Question 345538
1.{{{5x+4y=7}}}
2.{{{-3x+y=7}}}
From eq. 2,
{{{y=3x+7}}}
Substitute into eq. 1,
{{{5x+4(3x+7)=7}}}
{{{5x+12x+28=7}}}
{{{17x=-21}}}
{{{highlight(x=-21/17)}}}
.
.
.
{{{y=3(-21/17)+7}}}
{{{y=-63/17+119/17}}}
{{{highlight(y=56/17)}}}