30-5b=-3(b-7)+b

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Solution for 30-5b=-3(b-7)+b equation:


Simplifying
30 + -5b = -3(b + -7) + b

Reorder the terms:
30 + -5b = -3(-7 + b) + b
30 + -5b = (-7 * -3 + b * -3) + b
30 + -5b = (21 + -3b) + b

Combine like terms: -3b + b = -2b
30 + -5b = 21 + -2b

Solving
30 + -5b = 21 + -2b

Solving for variable 'b'.

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

Add '2b' to each side of the equation.
30 + -5b + 2b = 21 + -2b + 2b

Combine like terms: -5b + 2b = -3b
30 + -3b = 21 + -2b + 2b

Combine like terms: -2b + 2b = 0
30 + -3b = 21 + 0
30 + -3b = 21

Add '-30' to each side of the equation.
30 + -30 + -3b = 21 + -30

Combine like terms: 30 + -30 = 0
0 + -3b = 21 + -30
-3b = 21 + -30

Combine like terms: 21 + -30 = -9
-3b = -9

Divide each side by '-3'.
b = 3

Simplifying
b = 3

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