-7(10b+10)+9(b-9)=12b+2-7

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Solution for -7(10b+10)+9(b-9)=12b+2-7 equation:


Simplifying
-7(10b + 10) + 9(b + -9) = 12b + 2 + -7

Reorder the terms:
-7(10 + 10b) + 9(b + -9) = 12b + 2 + -7
(10 * -7 + 10b * -7) + 9(b + -9) = 12b + 2 + -7
(-70 + -70b) + 9(b + -9) = 12b + 2 + -7

Reorder the terms:
-70 + -70b + 9(-9 + b) = 12b + 2 + -7
-70 + -70b + (-9 * 9 + b * 9) = 12b + 2 + -7
-70 + -70b + (-81 + 9b) = 12b + 2 + -7

Reorder the terms:
-70 + -81 + -70b + 9b = 12b + 2 + -7

Combine like terms: -70 + -81 = -151
-151 + -70b + 9b = 12b + 2 + -7

Combine like terms: -70b + 9b = -61b
-151 + -61b = 12b + 2 + -7

Reorder the terms:
-151 + -61b = 2 + -7 + 12b

Combine like terms: 2 + -7 = -5
-151 + -61b = -5 + 12b

Solving
-151 + -61b = -5 + 12b

Solving for variable 'b'.

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

Add '-12b' to each side of the equation.
-151 + -61b + -12b = -5 + 12b + -12b

Combine like terms: -61b + -12b = -73b
-151 + -73b = -5 + 12b + -12b

Combine like terms: 12b + -12b = 0
-151 + -73b = -5 + 0
-151 + -73b = -5

Add '151' to each side of the equation.
-151 + 151 + -73b = -5 + 151

Combine like terms: -151 + 151 = 0
0 + -73b = -5 + 151
-73b = -5 + 151

Combine like terms: -5 + 151 = 146
-73b = 146

Divide each side by '-73'.
b = -2

Simplifying
b = -2

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