15=8(B-1)+9

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Solution for 15=8(B-1)+9 equation: 


Simplifying
15 = 8(B + -1) + 9

Reorder the terms:
15 = 8(-1 + B) + 9
15 = (-1 * 8 + B * 8) + 9
15 = (-8 + 8B) + 9

Reorder the terms:
15 = -8 + 9 + 8B

Combine like terms: -8 + 9 = 1
15 = 1 + 8B

Solving
15 = 1 + 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.
15 + -8B = 1 + 8B + -8B

Combine like terms: 8B + -8B = 0
15 + -8B = 1 + 0
15 + -8B = 1

Add '-15' to each side of the equation.
15 + -15 + -8B = 1 + -15

Combine like terms: 15 + -15 = 0
0 + -8B = 1 + -15
-8B = 1 + -15

Combine like terms: 1 + -15 = -14
-8B = -14

Divide each side by '-8'.
B = 1.75

Simplifying
B = 1.75

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