Tolong 10 mnit lgi diantar:)

Jawaban:

2x + 3y = -19

4x – y = 53

—————– substitusi

2x + 3y = -19

y = -53 + 4x

2x + 3(-53 + 4x) = -19

x = 10 ——> (1)

y = -53 + 4(10)

y = -53 + 40

y = -13 ——> (2)

(x, y) = (10, -13)

Nilai dari 2x + y = 2(10) + (-13)

= 20 + (-13)

= 7