-12=-4.2+b

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Solution for -12=-4.2+b equation:


Simplifying
-12 = -4.2 + b

Solving
-12 = -4.2 + 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.
-12 + -1b = -4.2 + b + -1b

Combine like terms: b + -1b = 0
-12 + -1b = -4.2 + 0
-12 + -1b = -4.2

Add '12' to each side of the equation.
-12 + 12 + -1b = -4.2 + 12

Combine like terms: -12 + 12 = 0
0 + -1b = -4.2 + 12
-1b = -4.2 + 12

Combine like terms: -4.2 + 12 = 7.8
-1b = 7.8

Divide each side by '-1'.
b = -7.8

Simplifying
b = -7.8

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