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x+y+z=-3
x-y=7 -
per
2y+z=4...Pers(4)
pers.. 2&3
x-y=7 |×2|
2x+2y-z=6 |×1|
per
2x-2y=7
2x+2y-z=6 -
per
4y-z=1... pers(5)
pers. 4&5
2y+z=4 |×2|
4y-z=1 |×1|
per
4y+2z=8
4y-z=1 -
per
3z=7
z=7/3
z=2,33
z=2,33 d sub. ke pers.. (4)
4y+4z=4
4y+4.2,33=4
4y=4-9,32
4y=-13,32
y=-13,32/4
y=-3,33
z=2,33 & y=-3,33 di sub.. ke pers. (1)
x+y+z=-3
x+(-3,33)+2,33=3
x+(-1)=3
x=3+1
x=4
hp = {(4),(-3,33),(2,33)
maaf klau slh
cek aja ulang ya