-28=-7(1-8b)-5(4b-3)

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Solution for -28=-7(1-8b)-5(4b-3) equation:


Simplifying
-28 = -7(1 + -8b) + -5(4b + -3)
-28 = (1 * -7 + -8b * -7) + -5(4b + -3)
-28 = (-7 + 56b) + -5(4b + -3)

Reorder the terms:
-28 = -7 + 56b + -5(-3 + 4b)
-28 = -7 + 56b + (-3 * -5 + 4b * -5)
-28 = -7 + 56b + (15 + -20b)

Reorder the terms:
-28 = -7 + 15 + 56b + -20b

Combine like terms: -7 + 15 = 8
-28 = 8 + 56b + -20b

Combine like terms: 56b + -20b = 36b
-28 = 8 + 36b

Solving
-28 = 8 + 36b

Solving for variable 'b'.

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

Add '-36b' to each side of the equation.
-28 + -36b = 8 + 36b + -36b

Combine like terms: 36b + -36b = 0
-28 + -36b = 8 + 0
-28 + -36b = 8

Add '28' to each side of the equation.
-28 + 28 + -36b = 8 + 28

Combine like terms: -28 + 28 = 0
0 + -36b = 8 + 28
-36b = 8 + 28

Combine like terms: 8 + 28 = 36
-36b = 36

Divide each side by '-36'.
b = -1

Simplifying
b = -1

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