2(x + 9) = 2x + 18
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Let the number be x and if 9+2x = 15 then x equals 3
The number is 45. The sum of its digits i.e. 4+5=9 Five times the sum of its digits i.e. 5 times 9 which is 45
Assign the term "any number" the value "x" Therefore: 9x + 5x = x(9+5) = 14x Therefore the sum of any two numbers which are multiples of a number is the base number multiplied by the sun of the multipliers.
9(4+n)Nine times the sum of 4 and a number is an expression and can not be evaluated.
81 8+1=9 9*9=81