0.13b+0.21(4b-50)=9

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Solution for 0.13b+0.21(4b-50)=9 equation: 


Simplifying
0.13b + 0.21(4b + -50) = 9

Reorder the terms:
0.13b + 0.21(-50 + 4b) = 9
0.13b + (-50 * 0.21 + 4b * 0.21) = 9
0.13b + (-10.5 + 0.84b) = 9

Reorder the terms:
-10.5 + 0.13b + 0.84b = 9

Combine like terms: 0.13b + 0.84b = 0.97b
-10.5 + 0.97b = 9

Solving
-10.5 + 0.97b = 9

Solving for variable 'b'.

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

Add '10.5' to each side of the equation.
-10.5 + 10.5 + 0.97b = 9 + 10.5

Combine like terms: -10.5 + 10.5 = 0.0
0.0 + 0.97b = 9 + 10.5
0.97b = 9 + 10.5

Combine like terms: 9 + 10.5 = 19.5
0.97b = 19.5

Divide each side by '0.97'.
b = 20.10309278

Simplifying
b = 20.10309278

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