Question

a number increased by 4 is the same as 19 minus 2 time the number

Answer 1

x + 4 = 19 - 2x (the number plus 4 equals 19 minus twice the unknown number)

So we need to isolate x. Start by adding 2x to both sides:

3x + 4 = 19

Now we subtract 4:

3x = 15

now get rid of the 3 by dividing by 3

x = 0.2