6.5=2.5r-1

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Solution for 6.5=2.5r-1 equation: 


Simplifying
6.5 = 2.5r + -1

Reorder the terms:
6.5 = -1 + 2.5r

Solving
6.5 = -1 + 2.5r

Solving for variable 'r'.

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

Add '-2.5r' to each side of the equation.
6.5 + -2.5r = -1 + 2.5r + -2.5r

Combine like terms: 2.5r + -2.5r = 0.0
6.5 + -2.5r = -1 + 0.0
6.5 + -2.5r = -1

Add '-6.5' to each side of the equation.
6.5 + -6.5 + -2.5r = -1 + -6.5

Combine like terms: 6.5 + -6.5 = 0.0
0.0 + -2.5r = -1 + -6.5
-2.5r = -1 + -6.5

Combine like terms: -1 + -6.5 = -7.5
-2.5r = -7.5

Divide each side by '-2.5'.
r = 3

Simplifying
r = 3

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