5-t=7t+21

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Solution for 5-t=7t+21 equation:


Simplifying
5 + -1t = 7t + 21

Reorder the terms:
5 + -1t = 21 + 7t

Solving
5 + -1t = 21 + 7t

Solving for variable 't'.

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

Add '-7t' to each side of the equation.
5 + -1t + -7t = 21 + 7t + -7t

Combine like terms: -1t + -7t = -8t
5 + -8t = 21 + 7t + -7t

Combine like terms: 7t + -7t = 0
5 + -8t = 21 + 0
5 + -8t = 21

Add '-5' to each side of the equation.
5 + -5 + -8t = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -8t = 21 + -5
-8t = 21 + -5

Combine like terms: 21 + -5 = 16
-8t = 16

Divide each side by '-8'.
t = -2

Simplifying
t = -2

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