28=3b-2-7b

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Solution for 28=3b-2-7b equation:


Simplifying
28 = 3b + -2 + -7b

Reorder the terms:
28 = -2 + 3b + -7b

Combine like terms: 3b + -7b = -4b
28 = -2 + -4b

Solving
28 = -2 + -4b

Solving for variable 'b'.

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

Add '4b' to each side of the equation.
28 + 4b = -2 + -4b + 4b

Combine like terms: -4b + 4b = 0
28 + 4b = -2 + 0
28 + 4b = -2

Add '-28' to each side of the equation.
28 + -28 + 4b = -2 + -28

Combine like terms: 28 + -28 = 0
0 + 4b = -2 + -28
4b = -2 + -28

Combine like terms: -2 + -28 = -30
4b = -30

Divide each side by '4'.
b = -7.5

Simplifying
b = -7.5

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