Question

x+3=15 can some body solve this for me

Answer 1

x+3=15   =   x+3-3=15-3
you need to isolate the variable... x
so now it is x=12 
hope that helped!

Answer 2

x+3=15

Subtract 3 from both sides

x+3-3=15-3

x=12

I hope that's help !

Check my answer

Replace x by 12

12+3=15

15=15

So... Yes my answer is correct !