3t-7=21-t

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Solution for 3t-7=21-t equation:


Simplifying
3t + -7 = 21 + -1t

Reorder the terms:
-7 + 3t = 21 + -1t

Solving
-7 + 3t = 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.
-7 + 3t + t = 21 + -1t + t

Combine like terms: 3t + t = 4t
-7 + 4t = 21 + -1t + t

Combine like terms: -1t + t = 0
-7 + 4t = 21 + 0
-7 + 4t = 21

Add '7' to each side of the equation.
-7 + 7 + 4t = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 4t = 21 + 7
4t = 21 + 7

Combine like terms: 21 + 7 = 28
4t = 28

Divide each side by '4'.
t = 7

Simplifying
t = 7

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