3(t-1)=21

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Solution for 3(t-1)=21 equation: 


Simplifying
3(t + -1) = 21

Reorder the terms:
3(-1 + t) = 21
(-1 * 3 + t * 3) = 21
(-3 + 3t) = 21

Solving
-3 + 3t = 21

Solving for variable 't'.

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

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

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

Combine like terms: 21 + 3 = 24
3t = 24

Divide each side by '3'.
t = 8

Simplifying
t = 8

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