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8x-5y=18 | x4 | 32x-20y = 72
3x+4y=-5 | x5 | 15x+20y = -25
------------------------------------------------ +
47x=47
x=47/47
x=1
2. subsitusikan kepers. 2 :
3x+4y=-5
3.(1)+4y=-5
3+4y=-5
4y=-5-3
4y=-8
y=-8/4
y=-2
jadi x=1 dan y= -2
semoga membantu.
3x+ 4y= -5. (*8)(*5)
____________
24x-15y=54
24x-32y=-40
__________________--
17y = 94
y=
koma dong hasilnya. y=5,529
x==
32x -20y=72. + 15x + 20y= -25
47x= 47
x= 1
y===
3x+4y=-5
3.1+4.y=-5
-5-3=4y
-8=4y
y=-8/4
y=-2