-21=4b+18-(-6b)

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Solution for -21=4b+18-(-6b) equation:


Simplifying
-21 = 4b + 18 + -1(-6b)

Remove parenthesis around (-6b)
-21 = 4b + 18 + -1 * -6b

Multiply -1 * -6
-21 = 4b + 18 + 6b

Reorder the terms:
-21 = 18 + 4b + 6b

Combine like terms: 4b + 6b = 10b
-21 = 18 + 10b

Solving
-21 = 18 + 10b

Solving for variable 'b'.

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

Add '-10b' to each side of the equation.
-21 + -10b = 18 + 10b + -10b

Combine like terms: 10b + -10b = 0
-21 + -10b = 18 + 0
-21 + -10b = 18

Add '21' to each side of the equation.
-21 + 21 + -10b = 18 + 21

Combine like terms: -21 + 21 = 0
0 + -10b = 18 + 21
-10b = 18 + 21

Combine like terms: 18 + 21 = 39
-10b = 39

Divide each side by '-10'.
b = -3.9

Simplifying
b = -3.9

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