SOLUTION: For the following problem, y varies inversely with x. If y = 14 when x = 12, find x when y is 21.

Algebra.Com
Question 1056248: For the following problem, y varies inversely with x.
If y = 14 when x = 12, find x when y is 21.
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
y varies inversely with x.

If y = 14 when x = 12, 
Substitute that in



Solve for k

Multiply both sides by 12



Substitute that in 



  <-- that's the formula

find x when y is 21.
Substitute 21 for y





Multiply both sides by x



Divide both sides by 21



Edwin
RELATED QUESTIONS

For the following problem, y varies inversely with x. If y = 9 when x = 4, find y when (answered by ikleyn,MathTherapy)
Y varies inversely with x. If y = -12 when x = 5, find y when x = 3 (answered by MathLover1)
For the following problem, y varies directly as x. If y = 18 when x = 12, find y when... (answered by rfer)
For the following problem, y varies inversely as the square of x. If y = 81 when x =... (answered by Edwin McCravy)
For the following problem, y varies inversely as the square of x. If y = 24 when x =... (answered by Fombitz)
For the following problems y varies inversely with the square of x. If y is 4 when x... (answered by Nate,narayaba,Prithwis)
y varies inversely with x. if y=-6 when x=-2 find y when... (answered by josgarithmetic,Theo)
If y varies inversely as x, and y=14 when x=5, find y when x=8. y=____(simplified). (answered by Cromlix)
y varies inversely with x. Find the inverse variation equation if x = -2 when y =... (answered by Cromlix)