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

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


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

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

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

Reorder the terms:
-7 + 9b + -2(3 + 4b) = 7
-7 + 9b + (3 * -2 + 4b * -2) = 7
-7 + 9b + (-6 + -8b) = 7

Reorder the terms:
-7 + -6 + 9b + -8b = 7

Combine like terms: -7 + -6 = -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 = 20
1b = 20

Divide each side by '1'.
b = 20

Simplifying
b = 20

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