Persamaan matriks 1/2(4, 2, -2, 8)=(-2+y, 4, 6, -2)+(5, -3, -7, x+4y) nilai 2x+y=

1/2 x 4 = -2 + y + 5
2 = 3 + y
- 1 = y

1/2 x 8 = -2 + X + 4y
4 = -2 + X + 4 x - 1
4 + 2 = X - 4
6 + 4 = x
10 = x

2x + y
= 2 x 10 + (-1) = 19
Bintangnya ya