-2r+t=4

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Solution for -2r+t=4 equation: 


Simplifying
-2r + t = 4

Solving
-2r + t = 4

Solving for variable 'r'.

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

Add '-1t' to each side of the equation.
-2r + t + -1t = 4 + -1t

Combine like terms: t + -1t = 0
-2r + 0 = 4 + -1t
-2r = 4 + -1t

Divide each side by '-2'.
r = -2 + 0.5t

Simplifying
r = -2 + 0.5t

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