13-(b-9)=30

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Solution for 13-(b-9)=30 equation: 


Simplifying
13 + -1(b + -9) = 30

Reorder the terms:
13 + -1(-9 + b) = 30
13 + (-9 * -1 + b * -1) = 30
13 + (9 + -1b) = 30

Combine like terms: 13 + 9 = 22
22 + -1b = 30

Solving
22 + -1b = 30

Solving for variable 'b'.

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

Add '-22' to each side of the equation.
22 + -22 + -1b = 30 + -22

Combine like terms: 22 + -22 = 0
0 + -1b = 30 + -22
-1b = 30 + -22

Combine like terms: 30 + -22 = 8
-1b = 8

Divide each side by '-1'.
b = -8

Simplifying
b = -8

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