.4*(17-4.25b)-3.15=4.16

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Solution for .4*(17-4.25b)-3.15=4.16 equation: 


Simplifying
0.4(17 + -4.25b) + -3.15 = 4.16
(17 * 0.4 + -4.25b * 0.4) + -3.15 = 4.16
(6.8 + -1.7b) + -3.15 = 4.16

Reorder the terms:
6.8 + -3.15 + -1.7b = 4.16

Combine like terms: 6.8 + -3.15 = 3.65
3.65 + -1.7b = 4.16

Solving
3.65 + -1.7b = 4.16

Solving for variable 'b'.

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

Add '-3.65' to each side of the equation.
3.65 + -3.65 + -1.7b = 4.16 + -3.65

Combine like terms: 3.65 + -3.65 = 0.00
0.00 + -1.7b = 4.16 + -3.65
-1.7b = 4.16 + -3.65

Combine like terms: 4.16 + -3.65 = 0.51
-1.7b = 0.51

Divide each side by '-1.7'.
b = -0.3

Simplifying
b = -0.3

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