8-9r=21t-17

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


Simplifying
8 + -9r = 21t + -17

Reorder the terms:
8 + -9r = -17 + 21t

Solving
8 + -9r = -17 + 21t

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + -9r = -17 + -8 + 21t

Combine like terms: 8 + -8 = 0
0 + -9r = -17 + -8 + 21t
-9r = -17 + -8 + 21t

Combine like terms: -17 + -8 = -25
-9r = -25 + 21t

Divide each side by '-9'.
r = 2.777777778 + -2.333333333t

Simplifying
r = 2.777777778 + -2.333333333t

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