(-3b-21)-6(10b+8)=

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Solution for (-3b-21)-6(10b+8)= equation:


Simplifying
(-3b + -21) + -6(10b + 8) = 0

Reorder the terms:
(-21 + -3b) + -6(10b + 8) = 0

Remove parenthesis around (-21 + -3b)
-21 + -3b + -6(10b + 8) = 0

Reorder the terms:
-21 + -3b + -6(8 + 10b) = 0
-21 + -3b + (8 * -6 + 10b * -6) = 0
-21 + -3b + (-48 + -60b) = 0

Reorder the terms:
-21 + -48 + -3b + -60b = 0

Combine like terms: -21 + -48 = -69
-69 + -3b + -60b = 0

Combine like terms: -3b + -60b = -63b
-69 + -63b = 0

Solving
-69 + -63b = 0

Solving for variable 'b'.

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

Add '69' to each side of the equation.
-69 + 69 + -63b = 0 + 69

Combine like terms: -69 + 69 = 0
0 + -63b = 0 + 69
-63b = 0 + 69

Combine like terms: 0 + 69 = 69
-63b = 69

Divide each side by '-63'.
b = -1.095238095

Simplifying
b = -1.095238095

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