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Dieliminasi 3y+2x=29 dengan ditambah
7y=49
y=7
2y-x=10
2(7)-x=10
-x=10-14
-x=-4
x=4
4x-7y
=4(4)-7(7)
=16-49
=-33
3y+2x=29 | x2 |
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6y - 3x = 30
6y + 4x = 58
_______________ -
-7x = 28
x = 28/7
x = 4
3y + 2y = 29
3y + 2(4) = 29
3y + 8 = 29
3y = 29-8
3y = 21
y= 21/3
y= 7
himpunan penyelesaian {4,7}