3t+2(t-1)=21

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Solution for 3t+2(t-1)=21 equation:


Simplifying
3t + 2(t + -1) = 21

Reorder the terms:
3t + 2(-1 + t) = 21
3t + (-1 * 2 + t * 2) = 21
3t + (-2 + 2t) = 21

Reorder the terms:
-2 + 3t + 2t = 21

Combine like terms: 3t + 2t = 5t
-2 + 5t = 21

Solving
-2 + 5t = 21

Solving for variable 't'.

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

Add '2' to each side of the equation.
-2 + 2 + 5t = 21 + 2

Combine like terms: -2 + 2 = 0
0 + 5t = 21 + 2
5t = 21 + 2

Combine like terms: 21 + 2 = 23
5t = 23

Divide each side by '5'.
t = 4.6

Simplifying
t = 4.6

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