Question

PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
when x=21, y=5. find x when y=25

Answer 1

when x is 21 and y is 5 means that y*4.2=x ( bc 21:5=4.2) so to find x u have to multiply y*4.2

Explanation:

21/5 = 4.2

25*4.2 = 105

Answer 2

This is a simple ratio. x : y. So x = 21 when y = 5.

21 : 5.

x : 25

So you are timesing each side by 5

So 21 x 5 = 105.

x = 105