-5(9-2b)=-20

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Solution for -5(9-2b)=-20 equation: 


Simplifying
-5(9 + -2b) = -20
(9 * -5 + -2b * -5) = -20
(-45 + 10b) = -20

Solving
-45 + 10b = -20

Solving for variable 'b'.

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

Add '45' to each side of the equation.
-45 + 45 + 10b = -20 + 45

Combine like terms: -45 + 45 = 0
0 + 10b = -20 + 45
10b = -20 + 45

Combine like terms: -20 + 45 = 25
10b = 25

Divide each side by '10'.
b = 2.5

Simplifying
b = 2.5

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