21-10b=5b-4

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Solution for 21-10b=5b-4 equation:


Simplifying
21 + -10b = 5b + -4

Reorder the terms:
21 + -10b = -4 + 5b

Solving
21 + -10b = -4 + 5b

Solving for variable 'b'.

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

Add '-5b' to each side of the equation.
21 + -10b + -5b = -4 + 5b + -5b

Combine like terms: -10b + -5b = -15b
21 + -15b = -4 + 5b + -5b

Combine like terms: 5b + -5b = 0
21 + -15b = -4 + 0
21 + -15b = -4

Add '-21' to each side of the equation.
21 + -21 + -15b = -4 + -21

Combine like terms: 21 + -21 = 0
0 + -15b = -4 + -21
-15b = -4 + -21

Combine like terms: -4 + -21 = -25
-15b = -25

Divide each side by '-15'.
b = 1.666666667

Simplifying
b = 1.666666667

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