(6*r)-(9*t)=-12

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Solution for (6*r)-(9*t)=-12 equation: 


Simplifying
(6r) + -1(9t) = -12

Remove parenthesis around (9t)
(6r) + -1 * 9t = -12

Multiply -1 * 9
(6r) + -9t = -12

Solving
(6r) + -9t = -12

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.
(6r) + -9t + 9t = -12 + 9t

Combine like terms: -9t + 9t = 0
(6r) + 0 = -12 + 9t
(6r) = -12 + 9t

Divide each side by '6'.
r = -2 + 1.5t

Simplifying
r = -2 + 1.5t

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