Question 15753
You were doing fine until 4x+2-2x+5=15
If you express it like this(4x+2)-(2x+5)=15 you may spot your error
you need to subtract(+5)from(+2).The equation will then be:
2x-3=15 so:
2x=18
x=9
Integers are then 9,10,11,12.

Pete