4.2-1.4b=21

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Solution for 4.2-1.4b=21 equation: 


Simplifying
4.2 + -1.4b = 21

Solving
4.2 + -1.4b = 21

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 + -1.4b = 21 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -1.4b = 21 + -4.2
-1.4b = 21 + -4.2

Combine like terms: 21 + -4.2 = 16.8
-1.4b = 16.8

Divide each side by '-1.4'.
b = -12

Simplifying
b = -12

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