Mathematics

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


Answers

ErasmoReye

2 years ago Comment

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