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6n - 4 - 3 = 3n + 10 + 4n -7 = 7n - 6n + 10 -17 = n
[ 25 - 6n ] is.
Here is one way. Start with: 4n - 7 = 5 - 2n add 2n to both sides to give: 6n - 7 = 5 add 7 to both sides to give: 6n = 12 divide both sides by 6 to give: n = 2
T(n) = 25 - 6n
Let the number be 'n', then the calculation becomes :- 5/n - 3 = 7/2n . . . multiply throughout by 2n 10 - 6n = 7 6n = 3 n = 1/2