-5.5-4(1+7b)=-21.5

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Solution for -5.5-4(1+7b)=-21.5 equation: 


Simplifying
-5.5 + -4(1 + 7b) = -21.5
-5.5 + (1 * -4 + 7b * -4) = -21.5
-5.5 + (-4 + -28b) = -21.5

Combine like terms: -5.5 + -4 = -9.5
-9.5 + -28b = -21.5

Solving
-9.5 + -28b = -21.5

Solving for variable 'b'.

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

Add '9.5' to each side of the equation.
-9.5 + 9.5 + -28b = -21.5 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + -28b = -21.5 + 9.5
-28b = -21.5 + 9.5

Combine like terms: -21.5 + 9.5 = -12
-28b = -12

Divide each side by '-28'.
b = 0.4285714286

Simplifying
b = 0.4285714286

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