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3x - 2y = 16
----------------------+
5x + 3y = 14
Jadi nilai 5x + 3y = 14 , Kebetulan kalau ditambah hasilnya pas jdinya cepet
2x + 5y = -2 | x 2 |
15x - 10y = 80
4x + 10y = -4
----------------- +
19x = 76
x = 4
substitusi
3(4) - 2y = 16
12 - 2y = 16
-2y = 16-12
y = -2
5x + 3y
5(4) + 3(-2)
= 20 + (-6)
= 14