-3b-7=20

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Solution for -3b-7=20 equation: 


Simplifying
-3b + -7 = 20

Reorder the terms:
-7 + -3b = 20

Solving
-7 + -3b = 20

Solving for variable 'b'.

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

Add '7' to each side of the equation.
-7 + 7 + -3b = 20 + 7

Combine like terms: -7 + 7 = 0
0 + -3b = 20 + 7
-3b = 20 + 7

Combine like terms: 20 + 7 = 27
-3b = 27

Divide each side by '-3'.
b = -9

Simplifying
b = -9

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