7-6(3+b)=21-2b

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Solution for 7-6(3+b)=21-2b equation:


Simplifying
7 + -6(3 + b) = 21 + -2b
7 + (3 * -6 + b * -6) = 21 + -2b
7 + (-18 + -6b) = 21 + -2b

Combine like terms: 7 + -18 = -11
-11 + -6b = 21 + -2b

Solving
-11 + -6b = 21 + -2b

Solving for variable 'b'.

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

Add '2b' to each side of the equation.
-11 + -6b + 2b = 21 + -2b + 2b

Combine like terms: -6b + 2b = -4b
-11 + -4b = 21 + -2b + 2b

Combine like terms: -2b + 2b = 0
-11 + -4b = 21 + 0
-11 + -4b = 21

Add '11' to each side of the equation.
-11 + 11 + -4b = 21 + 11

Combine like terms: -11 + 11 = 0
0 + -4b = 21 + 11
-4b = 21 + 11

Combine like terms: 21 + 11 = 32
-4b = 32

Divide each side by '-4'.
b = -8

Simplifying
b = -8

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