2.25-0.45=b

Solution for 2.25-0.45=b equation:

Simplifying
2.25 + -0.45 = b

Combine like terms: 2.25 + -0.45 = 1.8
1.8 = b

Solving
1.8 = b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-1b' to each side of the equation.
1.8 + -1b = b + -1b

Combine like terms: b + -1b = 0
1.8 + -1b = 0

Add '-1.8' to each side of the equation.
1.8 + -1.8 + -1b = 0 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + -1b = 0 + -1.8
-1b = 0 + -1.8

Combine like terms: 0 + -1.8 = -1.8
-1b = -1.8

Divide each side by '-1'.
b = 1.8

Simplifying
b = 1.8