-360=-20(-3b)

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Solution for -360=-20(-3b) equation:


Simplifying
-360 = -20(-3b)

Remove parenthesis around (-3b)
-360 = -20 * -3b

Multiply -20 * -3
-360 = 60b

Solving
-360 = 60b

Solving for variable 'b'.

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

Add '-60b' to each side of the equation.
-360 + -60b = 60b + -60b

Combine like terms: 60b + -60b = 0
-360 + -60b = 0

Add '360' to each side of the equation.
-360 + 360 + -60b = 0 + 360

Combine like terms: -360 + 360 = 0
0 + -60b = 0 + 360
-60b = 0 + 360

Combine like terms: 0 + 360 = 360
-60b = 360

Divide each side by '-60'.
b = -6

Simplifying
b = -6

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