If z is inversely proportional to x and z = 5 when x = 7, find the value of x when z = 70

x =

Step-by-step explanation:

Given that z is inversely proportional to x then the equation relating them is

z = ← k is the constant of proportion

To find k use the condition z = 5 when x = 7 , then

5 = ( multiply both sides by 7 )

35 = k

z = ← equation of proportion

When z = 70 , then

70 = ( multiply both sides by x )

70x = 35 ( divide both sides by 70 )

x = =

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4