5=-21+3t

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Solution for 5=-21+3t equation:


Simplifying
5 = -21 + 3t

Solving
5 = -21 + 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.
5 + -3t = -21 + 3t + -3t

Combine like terms: 3t + -3t = 0
5 + -3t = -21 + 0
5 + -3t = -21

Add '-5' to each side of the equation.
5 + -5 + -3t = -21 + -5

Combine like terms: 5 + -5 = 0
0 + -3t = -21 + -5
-3t = -21 + -5

Combine like terms: -21 + -5 = -26
-3t = -26

Divide each side by '-3'.
t = 8.666666667

Simplifying
t = 8.666666667

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