Answer:
number is 4
Explanation:
let n be the number then twice the number is 2n and the difference of the number and 3 is n - 3 , so
2n + 3(n - 3) = 11 ← distribute parenthesis and simplify left side
2n + 3n - 9 = 11
5n - 9 = 11 ( add 9 to both sides )
5n = 20 ( divide both sides by 5 )
n = 4
As a check
twice the number is 2 × 4 = 8
increased by 3 times the difference of n and 3 is
8 + 3(4 - 3) = 8 + 3(1) = 8 + 3 = 11 ← Correct