Simplifying 4.5 = 2a 
Solving 4.5 = 2a 
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
 Add '-2a' to each side of the equation. 4.5 + -2a = 2a + -2a
Combine like terms: 2a + -2a = 0 4.5 + -2a = 0
Add '-4.5' to each side of the equation. 
4.5 + -4.5 + -2a = 0 + -4.5
Combine like terms: 4.5 + -4.5 = 0.0 
0.0 + -2a = 0 + -4.5 
-2a = 0 + -4.5
Combine like terms: 0 + -4.5 = -4.5 
-2a = -4.5 
 Divide each side by '-2'. 
a = 2.25
 Simplifying 
a = 2.25
Let's check: 2 x 2.25 = 4.5
Next time, follow these steps and you will pass
Hope I helped :)