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There are two numbers four times as far from 5 as they are from 80. Find the two numbers.
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|x-5| = 4*|x-80|.
This equation deploys in two independent equations:
a) x-5 = 4(x-80) ---> x-5 = 4x-320 ---> 3x = 315 ---> x = 105
and
b) x-5 = -4(x-80) ---> x-5 = -4x+320 ---> 5x = 325 ---> x = 65.
Answer. The two numbers are 65 and 105.