(9b-1)-4(2b+3)=-7

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Solution for (9b-1)-4(2b+3)=-7 equation:


Simplifying
(9b + -1) + -4(2b + 3) = -7

Reorder the terms:
(-1 + 9b) + -4(2b + 3) = -7

Remove parenthesis around (-1 + 9b)
-1 + 9b + -4(2b + 3) = -7

Reorder the terms:
-1 + 9b + -4(3 + 2b) = -7
-1 + 9b + (3 * -4 + 2b * -4) = -7
-1 + 9b + (-12 + -8b) = -7

Reorder the terms:
-1 + -12 + 9b + -8b = -7

Combine like terms: -1 + -12 = -13
-13 + 9b + -8b = -7

Combine like terms: 9b + -8b = 1b
-13 + 1b = -7

Solving
-13 + 1b = -7

Solving for variable 'b'.

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

Add '13' to each side of the equation.
-13 + 13 + 1b = -7 + 13

Combine like terms: -13 + 13 = 0
0 + 1b = -7 + 13
1b = -7 + 13

Combine like terms: -7 + 13 = 6
1b = 6

Divide each side by '1'.
b = 6

Simplifying
b = 6

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