-30-3b=-4(b+7)

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Solution for -30-3b=-4(b+7) equation:


Simplifying
-30 + -3b = -4(b + 7)

Reorder the terms:
-30 + -3b = -4(7 + b)
-30 + -3b = (7 * -4 + b * -4)
-30 + -3b = (-28 + -4b)

Solving
-30 + -3b = -28 + -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.
-30 + -3b + 4b = -28 + -4b + 4b

Combine like terms: -3b + 4b = 1b
-30 + 1b = -28 + -4b + 4b

Combine like terms: -4b + 4b = 0
-30 + 1b = -28 + 0
-30 + 1b = -28

Add '30' to each side of the equation.
-30 + 30 + 1b = -28 + 30

Combine like terms: -30 + 30 = 0
0 + 1b = -28 + 30
1b = -28 + 30

Combine like terms: -28 + 30 = 2
1b = 2

Divide each side by '1'.
b = 2

Simplifying
b = 2

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