Respuesta :

Answer:

-7.5

Step-by-step explanation:

3.5z-2.7z is .8z

.8x=-6

.8 is 4/5

5/4 times .8z=5/4 times -6

-7.5
  • Answer:

z = - 7 1/2

  • Step-by-step explanation:

3.5z - 2.7z = - 6

0.8z = - 6

z = - 6/0.8

z = - 6 : 0.8

z = - 6 : 8/10

z = - 6 : 4/5

z = - 6 × 5/4

z = - 30/4

z = - 15/2

z = - 7  1/2