8-9t=21t-7

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Solution for 8-9t=21t-7 equation:


Simplifying
8 + -9t = 21t + -7

Reorder the terms:
8 + -9t = -7 + 21t

Solving
8 + -9t = -7 + 21t

Solving for variable 't'.

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

Add '-21t' to each side of the equation.
8 + -9t + -21t = -7 + 21t + -21t

Combine like terms: -9t + -21t = -30t
8 + -30t = -7 + 21t + -21t

Combine like terms: 21t + -21t = 0
8 + -30t = -7 + 0
8 + -30t = -7

Add '-8' to each side of the equation.
8 + -8 + -30t = -7 + -8

Combine like terms: 8 + -8 = 0
0 + -30t = -7 + -8
-30t = -7 + -8

Combine like terms: -7 + -8 = -15
-30t = -15

Divide each side by '-30'.
t = 0.5

Simplifying
t = 0.5

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