4t-9=21-t

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Solution for 4t-9=21-t equation:


Simplifying
4t + -9 = 21 + -1t

Reorder the terms:
-9 + 4t = 21 + -1t

Solving
-9 + 4t = 21 + -1t

Solving for variable 't'.

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

Add 't' to each side of the equation.
-9 + 4t + t = 21 + -1t + t

Combine like terms: 4t + t = 5t
-9 + 5t = 21 + -1t + t

Combine like terms: -1t + t = 0
-9 + 5t = 21 + 0
-9 + 5t = 21

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

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

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

Divide each side by '5'.
t = 6

Simplifying
t = 6

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