3r+9t=7u

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Solution for 3r+9t=7u equation: 


Simplifying
3r + 9t = 7u

Solving
3r + 9t = 7u

Solving for variable 'r'.

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

Add '-9t' to each side of the equation.
3r + 9t + -9t = -9t + 7u

Combine like terms: 9t + -9t = 0
3r + 0 = -9t + 7u
3r = -9t + 7u

Divide each side by '3'.
r = -3t + 2.333333333u

Simplifying
r = -3t + 2.333333333u

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