Answer:
z=5.86666666667
Step-by-step explanation:
15z-81=7
15z=88
15/15=88/15
x = 5/7
4 (0.25 - 2) = x - 0.75 (16 - 8x)
1 - 8 = x - 12 + 6x
1 - 8 + 12 = x + 6x
5 = 7x
5/7 = x