-7(8-3b)=-20

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Solution for -7(8-3b)=-20 equation: 


Simplifying
-7(8 + -3b) = -20
(8 * -7 + -3b * -7) = -20
(-56 + 21b) = -20

Solving
-56 + 21b = -20

Solving for variable 'b'.

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

Add '56' to each side of the equation.
-56 + 56 + 21b = -20 + 56

Combine like terms: -56 + 56 = 0
0 + 21b = -20 + 56
21b = -20 + 56

Combine like terms: -20 + 56 = 36
21b = 36

Divide each side by '21'.
b = 1.714285714

Simplifying
b = 1.714285714

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