Question

Diketahui x dan y merupakan penyelesaian x+2y=7 dan 2x+5y=-4 hitunglah nilai 2x+y

Answer 1

Verified answer

X + 2y = 7
x = 7 - 2y

2x + 5y = -4
2(7 - 2y) + 5y = 4
14 - 4y + 5y = 4
y = 4 - 14
y = -10

x = 7 - 2y
x = 7 - 2(-10)
x = 27

➡ 2x + y = 2(27) + (-10) = 54 - 10 = 44

Answer 2

X=13, y=-10
2x+y
=2(13)+y(10)
=26+10
=36