SOLUTION: Kylie is 12cm taller than Lee and KIm is 18 cm shorter than Lee.if the average of their heights is 22cm, how tall is kylie?

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Question 1011511: Kylie is 12cm taller than Lee and KIm is 18 cm shorter than Lee.if the average of their heights is 22cm, how tall is kylie?
Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!
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Kylie is 12cm taller than Lee and KIm is 18 cm shorter than Lee.if the average of their heights is 22cm, how tall is kylie?
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x = Kylie's height (in cm),
y = Lee' height, and
z = Kim's height.

x = y + 12,
z = y - 18,
%28x+%2B+y+%2B+z%29%2F3 = 22.

Solve this system. First step is to substitute expressions for x and z into the third equation and then solve it for y.

Please do it yourself. It is easy.