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5x-2y=4 ..... y= (5x+4)/2
6x-5y=-10 ..... 6x - 5 (5x+4)/2 = -10
12 x - 25x -20 = -20
13 x=40
x =40/13
y=....
eliminasi
5x-2y=4 x5 .... 25x -10y=20
6x-5y=-10 x2......12x - 10y=-20
------------------------------------------- (-)
13x=40 .... x= 40/13
gabungan keduanya
5x-2y=4
6x-5y=-10