Diketahui sistem persamaan linier 3x + 4y = -46 dan 2x = 5y. Nilai dari 4x - 3y adalah

Kelas 8 Matematika
Bab SPLDV

2x = 5y
x = 5y/2

3x + 4y = -46
3 . 5y/2 + 4y = -46
15y/2 + 4y = -46

** dikali 2 **

15y + 8y = -92
23y = -92
y = -92/23
y = -4

x = 5y/2
x = 5 . (-4) / 2
x = -10

4x - 3y
= 4 . (-10) - 3 . (-4)
= -40 + 12
= -28