what is the best solution for this system of linear equations?
x+2y=6
x-y=3

+3

(1) Answers

ErasmoReye

we can use "elimination".
(1) = x+2y=6
(2) = x-y=3
Multiply Equation 2 by -1
(3) = (2) * -1 = -x+y=-3
(3) + (1) = 3y=3
As a result, y =1
Plug y back in . x + 2y=6
x + 2 = 6
x=4