3b+8=9b-7

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Solution for 3b+8=9b-7 equation:


Simplifying
3b + 8 = 9b + -7

Reorder the terms:
8 + 3b = 9b + -7

Reorder the terms:
8 + 3b = -7 + 9b

Solving
8 + 3b = -7 + 9b

Solving for variable 'b'.

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

Add '-9b' to each side of the equation.
8 + 3b + -9b = -7 + 9b + -9b

Combine like terms: 3b + -9b = -6b
8 + -6b = -7 + 9b + -9b

Combine like terms: 9b + -9b = 0
8 + -6b = -7 + 0
8 + -6b = -7

Add '-8' to each side of the equation.
8 + -8 + -6b = -7 + -8

Combine like terms: 8 + -8 = 0
0 + -6b = -7 + -8
-6b = -7 + -8

Combine like terms: -7 + -8 = -15
-6b = -15

Divide each side by '-6'.
b = 2.5

Simplifying
b = 2.5

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