How do you solve this equation in numbers five times the diffrence of twice a number and three decreased by the sum of the number and eight equals 13

Answer 1

5(2n - 3) - (n + 8) = 13

10n - n - 23 = 13
9n = 36
n = ?

Answer 2

Assuming I interpreted your equation correctly:

5(2n+3) - (n+8) = 13

Combine terms.

10n + 15 - n - 8 = 13

9n = 6

Take it from there.