3t-21=2t-12

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Solution for 3t-21=2t-12 equation:


Simplifying
3t + -21 = 2t + -12

Reorder the terms:
-21 + 3t = 2t + -12

Reorder the terms:
-21 + 3t = -12 + 2t

Solving
-21 + 3t = -12 + 2t

Solving for variable 't'.

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

Add '-2t' to each side of the equation.
-21 + 3t + -2t = -12 + 2t + -2t

Combine like terms: 3t + -2t = 1t
-21 + 1t = -12 + 2t + -2t

Combine like terms: 2t + -2t = 0
-21 + 1t = -12 + 0
-21 + 1t = -12

Add '21' to each side of the equation.
-21 + 21 + 1t = -12 + 21

Combine like terms: -21 + 21 = 0
0 + 1t = -12 + 21
1t = -12 + 21

Combine like terms: -12 + 21 = 9
1t = 9

Divide each side by '1'.
t = 9

Simplifying
t = 9

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