-3(6b-7)=-21-4b

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Solution for -3(6b-7)=-21-4b equation:


Simplifying
-3(6b + -7) = -21 + -4b

Reorder the terms:
-3(-7 + 6b) = -21 + -4b
(-7 * -3 + 6b * -3) = -21 + -4b
(21 + -18b) = -21 + -4b

Solving
21 + -18b = -21 + -4b

Solving for variable 'b'.

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

Add '4b' to each side of the equation.
21 + -18b + 4b = -21 + -4b + 4b

Combine like terms: -18b + 4b = -14b
21 + -14b = -21 + -4b + 4b

Combine like terms: -4b + 4b = 0
21 + -14b = -21 + 0
21 + -14b = -21

Add '-21' to each side of the equation.
21 + -21 + -14b = -21 + -21

Combine like terms: 21 + -21 = 0
0 + -14b = -21 + -21
-14b = -21 + -21

Combine like terms: -21 + -21 = -42
-14b = -42

Divide each side by '-14'.
b = 3

Simplifying
b = 3

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