Question

Please help:
y varies directly with x. When y=20,x=50..find x when y=36

Answer 1

y varies directly with x =>
x=a*y
when y=20 and x=50
50=a*20
a=5/2
can you find now x when y=36 and you know coefficient of their relationship (a)?

Answer 2

when y=36, then:
x=ay
x=5/2 *36
x=5*18
x=90

Answer 3

thank you. can you solve my other ones?

Answer 4

ok. i'll see if i can find it