-8(b-4)-3b=21

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Solution for -8(b-4)-3b=21 equation:


Simplifying
-8(b + -4) + -3b = 21

Reorder the terms:
-8(-4 + b) + -3b = 21
(-4 * -8 + b * -8) + -3b = 21
(32 + -8b) + -3b = 21

Combine like terms: -8b + -3b = -11b
32 + -11b = 21

Solving
32 + -11b = 21

Solving for variable 'b'.

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

Add '-32' to each side of the equation.
32 + -32 + -11b = 21 + -32

Combine like terms: 32 + -32 = 0
0 + -11b = 21 + -32
-11b = 21 + -32

Combine like terms: 21 + -32 = -11
-11b = -11

Divide each side by '-11'.
b = 1

Simplifying
b = 1

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