12t-21=3t+9

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Solution for 12t-21=3t+9 equation:


Simplifying
12t + -21 = 3t + 9

Reorder the terms:
-21 + 12t = 3t + 9

Reorder the terms:
-21 + 12t = 9 + 3t

Solving
-21 + 12t = 9 + 3t

Solving for variable 't'.

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

Add '-3t' to each side of the equation.
-21 + 12t + -3t = 9 + 3t + -3t

Combine like terms: 12t + -3t = 9t
-21 + 9t = 9 + 3t + -3t

Combine like terms: 3t + -3t = 0
-21 + 9t = 9 + 0
-21 + 9t = 9

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

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

Combine like terms: 9 + 21 = 30
9t = 30

Divide each side by '9'.
t = 3.333333333

Simplifying
t = 3.333333333

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