9*(n+5) = 9n +9*5 = 9n + 45
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No odd number of odd numbers can sum to an even number.
( 5 + 3x )
6+n = 2n+5
The sum of number and four times a number is 25 write in algebraic expression
2*(x + 21) = 3*abs(x - 5) => x = -5.4 or x = 57.