3(-7-7b)=-189

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Solution for 3(-7-7b)=-189 equation: 


Simplifying
3(-7 + -7b) = -189
(-7 * 3 + -7b * 3) = -189
(-21 + -21b) = -189

Solving
-21 + -21b = -189

Solving for variable 'b'.

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

Add '21' to each side of the equation.
-21 + 21 + -21b = -189 + 21

Combine like terms: -21 + 21 = 0
0 + -21b = -189 + 21
-21b = -189 + 21

Combine like terms: -189 + 21 = -168
-21b = -168

Divide each side by '-21'.
b = 8

Simplifying
b = 8

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