Question

Solve porpotonial relations help answer and work please

Answer 1

5.
First, cross multiply the original fractions. You'll get:
2.5d=(2·35)
 
To isolate the variable d, divide both sides by it's coefficient, 2.5: 
2.5d/2.5=70/2.5

The result is d. The value of d is 28.
d=28

6.
3.5(36)= 18z

126= 18z

7= z