Question

suppose y varies directly with x. If x = 18, when y = 10 what is the value of x when y = 12

Answer 1

y varies directly with x

so, y = kx

given that x= 18, y= 10,
can you plug these in y = kx and get the value of k ??

Answer 2

i got k = 11.6? but doesnt work.

Answer 3

because we need the value of 'x' ! not k

Answer 4

still confused

Answer 5

y = kx
10 = 18k

k = 10/18.

y = kx
12 = (10/18) x

x = 12*18/10 = ..?

Answer 6

ohhhh!! thank you!!!

Answer 7

welcome ^_^