18b-21=15b+3

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Solution for 18b-21=15b+3 equation:


Simplifying
18b + -21 = 15b + 3

Reorder the terms:
-21 + 18b = 15b + 3

Reorder the terms:
-21 + 18b = 3 + 15b

Solving
-21 + 18b = 3 + 15b

Solving for variable 'b'.

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

Add '-15b' to each side of the equation.
-21 + 18b + -15b = 3 + 15b + -15b

Combine like terms: 18b + -15b = 3b
-21 + 3b = 3 + 15b + -15b

Combine like terms: 15b + -15b = 0
-21 + 3b = 3 + 0
-21 + 3b = 3

Add '21' to each side of the equation.
-21 + 21 + 3b = 3 + 21

Combine like terms: -21 + 21 = 0
0 + 3b = 3 + 21
3b = 3 + 21

Combine like terms: 3 + 21 = 24
3b = 24

Divide each side by '3'.
b = 8

Simplifying
b = 8

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