9*t-21=3(t-7)+6*t

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Solution for 9*t-21=3(t-7)+6*t equation: 


Simplifying
9t + -21 = 3(t + -7) + 6t

Reorder the terms:
-21 + 9t = 3(t + -7) + 6t

Reorder the terms:
-21 + 9t = 3(-7 + t) + 6t
-21 + 9t = (-7 * 3 + t * 3) + 6t
-21 + 9t = (-21 + 3t) + 6t

Combine like terms: 3t + 6t = 9t
-21 + 9t = -21 + 9t

Add '21' to each side of the equation.
-21 + 21 + 9t = -21 + 21 + 9t

Combine like terms: -21 + 21 = 0
0 + 9t = -21 + 21 + 9t
9t = -21 + 21 + 9t

Combine like terms: -21 + 21 = 0
9t = 0 + 9t
9t = 9t

Add '-9t' to each side of the equation.
9t + -9t = 9t + -9t

Combine like terms: 9t + -9t = 0
0 = 9t + -9t

Combine like terms: 9t + -9t = 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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