Jawaban:

nilai dari 5x + 2y - 2z = 16

Penjelasan:

3x + 4y = 36......(I)

2x + z = 16.........(II)

2y + 3z = 36.......(III)

(I) 3x + 4y = 36 |×2| 6x +8y = 72

(II) 2x + z = 16 |×3| 6x +3z = 48 _

8y -3z = 24.....(IV)

(III) 2y + 3z = 36

(IV) 8y -3z = 24 +

10y = 60

y = 60/10

y = 6

(I) 3x + 4y = 36

3x + 4(6) = 36

3x + 24 = 36

3x = 36-24

3x = 12

x = 12/3

x = 4

(II) 2x + z = 16

2(4) + z = 16

8 + z = 16

z = 16 - 8

z = 8

X= 4

y= 6

z= 8

nilai dari (5x + 2y - 2z)

5(4) + 2(6) - 2(8) =

20 + 12 - 16 = 16

Smoga Membantuu:)