Question

A number increased by four is the same as 19-2 times the number

Answer 1

n + 4 = 19 - 2n
4 - 19 = -2n - n
-15 = -3n
-15/-3 = n
5 = n <===

Answer 2

A+4=19-2×A.
A+4=19-2A
-4=-4
A=15-2A
+2A=+2A
3A=15 A is the number
÷3= ÷3
A=5

step by step how to do the problem, hope it's how you were trying to solve it.