(9b-1)-4(2b+2)=-7

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Solution for (9b-1)-4(2b+2)=-7 equation:


Simplifying
(9b + -1) + -4(2b + 2) = -7

Reorder the terms:
(-1 + 9b) + -4(2b + 2) = -7

Remove parenthesis around (-1 + 9b)
-1 + 9b + -4(2b + 2) = -7

Reorder the terms:
-1 + 9b + -4(2 + 2b) = -7
-1 + 9b + (2 * -4 + 2b * -4) = -7
-1 + 9b + (-8 + -8b) = -7

Reorder the terms:
-1 + -8 + 9b + -8b = -7

Combine like terms: -1 + -8 = -9
-9 + 9b + -8b = -7

Combine like terms: 9b + -8b = 1b
-9 + 1b = -7

Solving
-9 + 1b = -7

Solving for variable 'b'.

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

Add '9' to each side of the equation.
-9 + 9 + 1b = -7 + 9

Combine like terms: -9 + 9 = 0
0 + 1b = -7 + 9
1b = -7 + 9

Combine like terms: -7 + 9 = 2
1b = 2

Divide each side by '1'.
b = 2

Simplifying
b = 2

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