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 = 15t
-21 + 15t = 9 + -3t + 3t

Combine like terms: -3t + 3t = 0
-21 + 15t = 9 + 0
-21 + 15t = 9

Add '21' to each side of the equation.
-21 + 21 + 15t = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 15t = 9 + 21
15t = 9 + 21

Combine like terms: 9 + 21 = 30
15t = 30

Divide each side by '15'.
t = 2

Simplifying
t = 2

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