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y=30
x-2y
-29-2(30)=-89
Gunakan cara eliminasi.
5x-3y=26 | × 2 | 10x-6y=52
3x-2y=27 | × 3 | 9x-6y=81
----------------- ₋
x = - 29
5x-3y=26
5 ( - 29) - 3y = 26
- 145 - 3y = 26
- 3y = 26 + 145
- 3y = 171
y = - 57
x - 2y
= - 29 - 2( - 57)
= - 29 + 114
= 85 (jawaban akhir)
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