Answer:
{y,x}={5,2}
See steps
Step by Step Solution:
More Icon
System of Linear Equations entered :
[1] y-x=3
[2] 2x+y=9
Equations Simplified or Rearranged :
[1] y - x = 3
[2] y + 2x = 9
Graphic Representation of the Equations :
x + y = 3 2x + y = 9
Solve by Substitution :
// Solve equation [2] for the variable y
[2] y = -2x + 9
// Plug this in for variable y in equation [1]
[1] (-2x+9) - x = 3
[1] - 3x = -6
// Solve equation [1] for the variable x
[1] 3x = 6
[1] x = 2
// By now we know this much :
y = -2x+9
x = 2
Solution :
{y,x} = {5,2}
