13-7b=4b-9

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Solution for 13-7b=4b-9 equation:


Simplifying
13 + -7b = 4b + -9

Reorder the terms:
13 + -7b = -9 + 4b

Solving
13 + -7b = -9 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
13 + -7b + -4b = -9 + 4b + -4b

Combine like terms: -7b + -4b = -11b
13 + -11b = -9 + 4b + -4b

Combine like terms: 4b + -4b = 0
13 + -11b = -9 + 0
13 + -11b = -9

Add '-13' to each side of the equation.
13 + -13 + -11b = -9 + -13

Combine like terms: 13 + -13 = 0
0 + -11b = -9 + -13
-11b = -9 + -13

Combine like terms: -9 + -13 = -22
-11b = -22

Divide each side by '-11'.
b = 2

Simplifying
b = 2

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