Solution :
{y,x} = {3,2}
System of Linear Equations entered :
[1] y - 2x = -1
[2] y + x = 5
// Solve equation [2] for the variable x
[2] x = -y + 5
// Plug this in for variable x in equation [1]
[1] y - 2•(-y +5) = -1
[1] 3y = 9
// Solve equation [1] for the variable y
[1] 3y = 9
[1] y = 3
// By now we know this much :
y = 3
x = -y+5
// Use the y value to solve for x
x = -(3)+5 = 2
Solution :
{y,x} = {3,2}
