3-b=7b-9

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Solution for 3-b=7b-9 equation:


Simplifying
3 + -1b = 7b + -9

Reorder the terms:
3 + -1b = -9 + 7b

Solving
3 + -1b = -9 + 7b

Solving for variable 'b'.

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

Add '-7b' to each side of the equation.
3 + -1b + -7b = -9 + 7b + -7b

Combine like terms: -1b + -7b = -8b
3 + -8b = -9 + 7b + -7b

Combine like terms: 7b + -7b = 0
3 + -8b = -9 + 0
3 + -8b = -9

Add '-3' to each side of the equation.
3 + -3 + -8b = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -8b = -9 + -3
-8b = -9 + -3

Combine like terms: -9 + -3 = -12
-8b = -12

Divide each side by '-8'.
b = 1.5

Simplifying
b = 1.5

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