Tolong bantu yaa :))

SPLTV

1.
3x - 2y + z = 2
x  + y - z = 0
jumlahkan
4x - y = 2 ....(1)
.
x + y - z = 0
2x - y+ z = 3
jumlahkan
3x = 3
x = 1 , substitusikan ke (1)
.
4x - y = 2
y = 4x - 2 =  4(1) - 2
y = 2
.
x + y - z = 0
1 + 2 - z = 0
z = 3

nilai 5x + 2y + 3z = 5(1) + 2(2) + 3(3)=18

2.
x - 2y =  -1
y + 3z = 11...kalikan 2
.
x - 2y = - 3
2y + 6z = 22
jumlahkan
x + 6z  = 19
eliminir dgn  x- z = - 2
.
x+ 6z= 19
x - z = - 2
kurangkan
7z = 21
z = 3

x - z = - 2
x  = -2 + z
x = -2 + 3
x  = 1

y + 3z = 11
y + 3(3) = 1
y = 2

5x + y - z = 5(1) + (2) - (3)
5x + y - z = 4