Diketahui sistem persamaan 4x+3y = 17 dan2x-8y = 57. Nilai dari -3x-4y = .... Tolong di jawab ya saya kasih 14 poin Terima kasih

4x + 3y = 17 (×1) = 4x + 3y = 17
2x - 8y = 57 (×2) = 4x - 16y = 114 _
19y = -97
y = -5,1

4x + 3(-5,1) = 17
4x - 15,3 = 17
4x = 17 + 15,3
4x = 32,3
x = 8,7





tolong brainlest answer