-5(1-2b)=20

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Solution for -5(1-2b)=20 equation: 


Simplifying
-5(1 + -2b) = 20
(1 * -5 + -2b * -5) = 20
(-5 + 10b) = 20

Solving
-5 + 10b = 20

Solving for variable 'b'.

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

Add '5' to each side of the equation.
-5 + 5 + 10b = 20 + 5

Combine like terms: -5 + 5 = 0
0 + 10b = 20 + 5
10b = 20 + 5

Combine like terms: 20 + 5 = 25
10b = 25

Divide each side by '10'.
b = 2.5

Simplifying
b = 2.5

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