3t+9=-21

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Solution for 3t+9=-21 equation: 


Simplifying
3t + 9 = -21

Reorder the terms:
9 + 3t = -21

Solving
9 + 3t = -21

Solving for variable 't'.

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

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

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

Combine like terms: -21 + -9 = -30
3t = -30

Divide each side by '3'.
t = -10

Simplifying
t = -10

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