Question

{8x-9y=4 {-3x+4y=1 solve system

Answer 1

{8x-9y=4/*4⇒32x-36y=16
{-3x+4y=1/*9⇒-27x+36y=9
прибавим
5x=25
x=5
40-9y=4
9y=36
y=4
(5;4)