3(9-b)-45=21b-6(3+4b)

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Solution for 3(9-b)-45=21b-6(3+4b) equation: 


Simplifying
3(9 + -1b) + -45 = 21b + -6(3 + 4b)
(9 * 3 + -1b * 3) + -45 = 21b + -6(3 + 4b)
(27 + -3b) + -45 = 21b + -6(3 + 4b)

Reorder the terms:
27 + -45 + -3b = 21b + -6(3 + 4b)

Combine like terms: 27 + -45 = -18
-18 + -3b = 21b + -6(3 + 4b)
-18 + -3b = 21b + (3 * -6 + 4b * -6)
-18 + -3b = 21b + (-18 + -24b)

Reorder the terms:
-18 + -3b = -18 + 21b + -24b

Combine like terms: 21b + -24b = -3b
-18 + -3b = -18 + -3b

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

Combine like terms: -18 + 18 = 0
0 + -3b = -18 + 18 + -3b
-3b = -18 + 18 + -3b

Combine like terms: -18 + 18 = 0
-3b = 0 + -3b
-3b = -3b

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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