3b-7=8b-9

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


Simplifying
3b + -7 = 8b + -9

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

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

Solving
-7 + 3b = -9 + 8b

Solving for variable 'b'.

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

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

Combine like terms: 3b + -8b = -5b
-7 + -5b = -9 + 8b + -8b

Combine like terms: 8b + -8b = 0
-7 + -5b = -9 + 0
-7 + -5b = -9

Add '7' to each side of the equation.
-7 + 7 + -5b = -9 + 7

Combine like terms: -7 + 7 = 0
0 + -5b = -9 + 7
-5b = -9 + 7

Combine like terms: -9 + 7 = -2
-5b = -2

Divide each side by '-5'.
b = 0.4

Simplifying
b = 0.4

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