SOLUTION: I have a problem that I could use some help understanding how to solve/answer from a homework sheet. x varies directly with y and inversely with z. x=20 when y=8 and z=4. Find x wh

Algebra ->  Real-numbers -> SOLUTION: I have a problem that I could use some help understanding how to solve/answer from a homework sheet. x varies directly with y and inversely with z. x=20 when y=8 and z=4. Find x wh      Log On


   



Question 139309: I have a problem that I could use some help understanding how to solve/answer from a homework sheet. x varies directly with y and inversely with z. x=20 when y=8 and z=4. Find x when y=4 and z=8. Thank you
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
x+=+%28Ay%29%2F%28Bz%29+
A ratio of y/z of 8/4 =2 yields an x = 20.
What is x if the ratio of y/z = 4/8 = 1/2??
Use ratios.
+20%2F2+=+x%2F%281%2F2%29
+10+=+2x
+5+=+x+