3t-21=9+8t

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Solution for 3t-21=9+8t equation:


Simplifying
3t + -21 = 9 + 8t

Reorder the terms:
-21 + 3t = 9 + 8t

Solving
-21 + 3t = 9 + 8t

Solving for variable 't'.

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

Add '-8t' to each side of the equation.
-21 + 3t + -8t = 9 + 8t + -8t

Combine like terms: 3t + -8t = -5t
-21 + -5t = 9 + 8t + -8t

Combine like terms: 8t + -8t = 0
-21 + -5t = 9 + 0
-21 + -5t = 9

Add '21' to each side of the equation.
-21 + 21 + -5t = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -5t = 9 + 21
-5t = 9 + 21

Combine like terms: 9 + 21 = 30
-5t = 30

Divide each side by '-5'.
t = -6

Simplifying
t = -6

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