Problema Solution
Twice the difference of a number and 9 is equal to three times the sum of the number and 9
Answer provided by our tutors
let 'x' be the number
if x => 9 the solution is
2(x - 9) = 3(x + 9)
x = -45
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if x < 9 the solution is
2(9 - x) = 3(x + 9)
x = -1.8
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