B=13-[12-4x(-1)-7]x(5-7.5)

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Solution for B=13-[12-4x(-1)-7]x(5-7.5) equation: 


Simplifying
B = 13 + -1[12 + -4x(-1) + -7] * x(5 + -7.5)

Reorder the terms for easier multiplication:
B = 13 + -1[12 + -4 * -1x + -7] * x(5 + -7.5)

Multiply -4 * -1
B = 13 + -1[12 + 4x + -7] * x(5 + -7.5)

Reorder the terms:
B = 13 + -1[12 + -7 + 4x] * x(5 + -7.5)

Combine like terms: 12 + -7 = 5
B = 13 + -1[5 + 4x] * x(5 + -7.5)

Combine like terms: 5 + -7.5 = -2.5
B = 13 + -1[5 + 4x] * x(-2.5)

Reorder the terms for easier multiplication:
B = 13 + -1 * -2.5x[5 + 4x]

Multiply -1 * -2.5
B = 13 + 2.5x[5 + 4x]
B = 13 + [5 * 2.5x + 4x * 2.5x]
B = 13 + [12.5x + 10x2]

Solving
B = 13 + 12.5x + 10x2

Solving for variable 'B'.

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

Simplifying
B = 13 + 12.5x + 10x2

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