2x+5y=143 - 2x+8y=141 berapa eliminasi dan subtitusi tersebut

Jwab
Persamaan Linier

2x+ 5y = 143
-2x +8y = 141 ......(+)
13y = 284
y = 284/13 

2x + 5y = 143
2x  + 5(284/13) = 143
2x + 1.420/13 = 143
2x = 143 - 1.420/13
2x = 400/13
x = 200/13

(x,y )  = ( 200/13 , 284/13)

[tex]2 x + 5y = 143 - 2 x + 8y = 141 \\ = 4x + 13y = 2[/tex]