-3b(7a-3b)+7(-5ab-8b^2)=

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Solution for -3b(7a-3b)+7(-5ab-8b^2)= equation:


Simplifying
-3b(7a + -3b) + 7(-5ab + -8b2) = 0
(7a * -3b + -3b * -3b) + 7(-5ab + -8b2) = 0
(-21ab + 9b2) + 7(-5ab + -8b2) = 0
-21ab + 9b2 + (-5ab * 7 + -8b2 * 7) = 0
-21ab + 9b2 + (-35ab + -56b2) = 0

Reorder the terms:
-21ab + -35ab + 9b2 + -56b2 = 0

Combine like terms: -21ab + -35ab = -56ab
-56ab + 9b2 + -56b2 = 0

Combine like terms: 9b2 + -56b2 = -47b2
-56ab + -47b2 = 0

Solving
-56ab + -47b2 = 0

Solving for variable 'a'.

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

Add '47b2' to each side of the equation.
-56ab + -47b2 + 47b2 = 0 + 47b2

Combine like terms: -47b2 + 47b2 = 0
-56ab + 0 = 0 + 47b2
-56ab = 0 + 47b2
Remove the zero:
-56ab = 47b2

Divide each side by '-56b'.
a = -0.8392857143b

Simplifying
a = -0.8392857143b

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