(9b+7)-(8b+2)=-4

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Solution for (9b+7)-(8b+2)=-4 equation:


Simplifying
(9b + 7) + -1(8b + 2) = -4

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

Remove parenthesis around (7 + 9b)
7 + 9b + -1(8b + 2) = -4

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

Reorder the terms:
7 + -2 + 9b + -8b = -4

Combine like terms: 7 + -2 = 5
5 + 9b + -8b = -4

Combine like terms: 9b + -8b = 1b
5 + 1b = -4

Solving
5 + 1b = -4

Solving for variable 'b'.

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

Add '-5' to each side of the equation.
5 + -5 + 1b = -4 + -5

Combine like terms: 5 + -5 = 0
0 + 1b = -4 + -5
1b = -4 + -5

Combine like terms: -4 + -5 = -9
1b = -9

Divide each side by '1'.
b = -9

Simplifying
b = -9

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