<span><span> {x,y} = {-1,2}</span>
</span><span> [2] 5y = -3x + 7
[2] y = -3x/5 + 7/5</span>
// Plug this in for variable y in equation [1]
<span><span> [1] -5x + 2•(-3x/5+7/5) = 9
</span><span> [1] -31x/5 = 31/5
</span><span> [1] -31x = 31
</span></span>
// Solve equation [1] for the variable x
<span><span> [1] 31x = - 31</span>
<span> [1] x = - 1</span> </span>
// By now we know this much :
<span><span> x = -1</span>
<span> y = -3x/5+7/5</span></span>
<span>// Use the x value to solve for y
</span>
<span> y = -(3/5)(-1)+7/5 = 2 </span>Solution :<span><span> {x,y} = {-1,2}</span>
</span>
<span>
</span>
