8-9t=21+-17

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Solution for 8-9t=21+-17 equation: 


Simplifying
8 + -9t = 21 + -17

Combine like terms: 21 + -17 = 4
8 + -9t = 4

Solving
8 + -9t = 4

Solving for variable 't'.

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

Add '-8' to each side of the equation.
8 + -8 + -9t = 4 + -8

Combine like terms: 8 + -8 = 0
0 + -9t = 4 + -8
-9t = 4 + -8

Combine like terms: 4 + -8 = -4
-9t = -4

Divide each side by '-9'.
t = 0.4444444444

Simplifying
t = 0.4444444444

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