Question

tolong dibantu menjawab

x+y+z = 2
3y - 4z = -5
8z = 4

(x-y)=???​

Answer 1

Verified answer

Penjelasan dengan langkah-langkah:

8z=4

z=1/2

3y-4z=-5

3y-4(1/2)=-5

3y-2=-5

3y=-3

y=-1

x+y+z=2

x-1+1/2=2

x-2/2+1/2=2

x-1/2=2

x=2+1/2

x=4/2+1/2

x=5/2

maka x-y

= 5/2 - (-1)

= 5/2+1

= 5/2+2/2

= 7/2

Answer 2

Jawab:

Penjelasan dengan langkah-langkah:

x+y+z = 2

3y - 4z = -5

8z = 4

(i) z= 4/8=1/2

(ii) 3y - 4z = -5

    3y - 4x1/2 = -5

    3y - 2 = -5

    3y = -5+2

    3y = -3

      y = -1

(iii) x+y+z=2

     x+-1+1/2=2

     x= 2+1-1/2

     x= 2 1/2

(iv) x - y  ; 2 1/2 - (-1)= 2 1/2 + 1 = 3 1/2