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## Homework Statement

I'm not sure what I'm doing wrong on this problem! Please help :)

Suppose that on a linear temperature scale X, water boils at -40.0°X and freezes at -174°X. What is a temperature of 146 K on the X scale? (Approximate water's boiling point as 373 K.)

## Homework Equations

## The Attempt at a Solution

(K

_{1},X

_{1})=(373, -40)

(K

_{2},X

_{2})=(273, -174)

m=(X

_{2}-X

_{1})/(K

_{2}-K

_{1})=0.74627 X per K

X-X

_{1}=m(K-K

_{1})

X=0.74627K-238.358

X=0.74627(146)-238.358

X= -129.4