You can put this solution on YOUR website! -2x + y=-1
x + y = 5
multiply the 1st equation by - 1 and you have
2x - y = 1
x + y = 5
--------------additions eliminates y, find x
3x = 6
x =
x = 2
:
Find y by substituting 2 for x in the 2nd equation
2 + y = 5
subtract 2 from both sides
y = 5 - 2
y = 3
:
:
Check solutions in the 1st equation -2x + y = -1
-2(2) + 3 =
-4 + 3 = -1; confirms our solutions
;
Not that hard, right?
