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(25 points)
If y is proportional to x and y = -15 when x = -20, what is the value of x when y = 12?

Please show your work so I can understand how to solve!

Respuesta :

Here, y = -15 with x = -20
LCM of 15 & 20 is 60, so divide 15 & 20 from 60, 
60/15 = 4 & 60/20 = 3

Now, multiply the results with intial values, 
4y = 3x
y = 3/4 x

When y = 12, 
x = 12 * 4/3
x = 48 / 3
x = 16

In short, Your Answer would be 16

Hope this helps!

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