Question

Mohon dengan sangat atas partisipasinya pak guru buk guru dan teman sekalian.
Terimakasih.

Answer 1

Verified answer

Persamaan Linier

x + y/2 = 10 --> kalikan 2 --> 2x + y = 20 ...(1)
y/4 - z = - 2 --> kalikan 4 --> y - 4z = - 8 ...(2)
z/2 + x/3 = 4 --> kalikan 6 --> 3z + 2x = 24 ...(3)
.
eliminasikan (1) dan (2)
2x + y = 20
y - 4z = -8
kurangkan
2x + 4z = 28 ...(4)
.
eliminasikan (3) dan (4)
2x + 3z = 24
2x + 4z = 28
kurangkan
-z = - 4 --> z = 4
.
2x + 3z = 24 --> 2x + 3(4) = 24
2x + 12 = 24
2x = 12
x = 6
.
y - 4z = -8
y - 4(4) = - 8
y - 16 = -8
y = 8
,
x + y + z = 8 + 6 + 4
x + y + z = 18