b-4.2=-5

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Solution for b-4.2=-5 equation: 


Simplifying
b + -4.2 = -5

Reorder the terms:
-4.2 + b = -5

Solving
-4.2 + b = -5

Solving for variable 'b'.

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

Add '4.2' to each side of the equation.
-4.2 + 4.2 + b = -5 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + b = -5 + 4.2
b = -5 + 4.2

Combine like terms: -5 + 4.2 = -0.8
b = -0.8

Simplifying
b = -0.8

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