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3x - 2y = -13 X2
6x + 9y = 0
6x - 4y = -26
---------------------- -
13x = 26
x = 26/13
x = 2
2x + 3y = 0
2(2) + 3y = 0
4 + 3y = 0
3y = -4
y = -4/3
x+y = 2 + (-4/3)
= 6/3 - 4/3
= 2/3
Maaf, kalau salah.
3x-2y=-13 (*2)
6x+9y=0
6x-4y=-26
------------ -
13y=26
y= 26/13 =2
2x+3y=0
2x+3*2=0
2x+6=0
2x=0-6
x= -6/2 = 3.
x+y : 3+2=5.