0.3[b-21]=3.6

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Solution for 0.3[b-21]=3.6 equation:


Simplifying
0.3[b + -21] = 3.6

Reorder the terms:
0.3[-21 + b] = 3.6
[-21 * 0.3 + b * 0.3] = 3.6
[-6.3 + 0.3b] = 3.6

Solving
-6.3 + 0.3b = 3.6

Solving for variable 'b'.

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

Add '6.3' to each side of the equation.
-6.3 + 6.3 + 0.3b = 3.6 + 6.3

Combine like terms: -6.3 + 6.3 = 0.0
0.0 + 0.3b = 3.6 + 6.3
0.3b = 3.6 + 6.3

Combine like terms: 3.6 + 6.3 = 9.9
0.3b = 9.9

Divide each side by '0.3'.
b = 33

Simplifying
b = 33

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