3+b=4.2

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Solution for 3+b=4.2 equation: 


Simplifying
3 + b = 4.2

Solving
3 + b = 4.2

Solving for variable 'b'.

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

Add '-3' to each side of the equation.
3 + -3 + b = 4.2 + -3

Combine like terms: 3 + -3 = 0
0 + b = 4.2 + -3
b = 4.2 + -3

Combine like terms: 4.2 + -3 = 1.2
b = 1.2

Simplifying
b = 1.2

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