Question

How can I resolve 5-3*= -45??
(* means X)

Answer 1

5 - 3x = -45
-5 -5
-3x = -50
-3 -3
x ≈ 16.67

Answer 2

5-3x = -45
you subtract 5 from both sides and get:
-3x = -50
then you divide by -3 on both sides and get:
x = 16.66666666667