Question

X+5=17 How do you do it????

Answer 1

X + 5 = 17
X = 17 - 5
X = 12

Hope I helped (≧∇≦)
Comment if you still don't understand ( ´▽` )ﾉ

Answer 2

Ok so you want the X by its self so you subtrasct 5 to both sides
X+5-5=17-5
X=12