The number which is represented by the expression "five more than a certain number is 4 less than one-half that number" is -2/3
let
the unknown number = x
x + 5 = 4 - 1/2x
x + 1/2x = 4 - 5
1 1/2x = -1
x = -1 ÷ 3/2
= -1 × 2/3
= -2/3
Therefore, the number which is represented by the expression "five more than a certain number is 4 less than one-half that number" is -2/3
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