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x=3+y
substitusikan
2x+3y=6
2(3+y)+3y=6
6+2y+3y=6
5y=0
y=0
x-y=3
x-0=3
x=3
jadi x=3 dan y=0
x - y = 3 ---------------------------- kali 2
2x + 3y = 6
2x - 2y = 6
-------------------- -
5y = 0
y = 0
2x + 3y = 6
2x + 3(0) = 6
2x = 6
x = 6/2
x = 3
Himpunan Penyelesaian = (3,0)