diketahui persamaa linear 4x+3y=23 dan 5x-7y=-25 nilai x dan y adalah.. beserta caranya

Bab Sistem Persamaan Linear Dua Variabel

4x + 3y = 23 [×5]
5x - 7y = -25 [×4]

20x + 15y = 115
20x - 28y = -100
_____________ -
43y = 215
y = 5

4x + 3(5) = 23
4x = 23 - 15
x = 8/4
x = 2

4x + 3y = 23......1
5x - 7y = - 25....2
Agar bisa dieliminasi,... 1 dikali 5 dan... 2 dikali 4 sehingga,
20x + 15y = 115........1
20x - 28y = - 100...2
Dan dikurangi, sehingga
15y - (-28y) = 115 - (-100)
15y + 28y = 115 + 100
43y = 215
y = 5
Lalu masukkan ke.... 1
20x + 15(5) = 115
20x + 75 = 115
20x = 40
x = 2

*tolong jadikan jawaban terbaik