2.5r-4=21.5

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Solution for 2.5r-4=21.5 equation: 


Simplifying
2.5r + -4 = 21.5

Reorder the terms:
-4 + 2.5r = 21.5

Solving
-4 + 2.5r = 21.5

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + 2.5r = 21.5 + 4

Combine like terms: -4 + 4 = 0
0 + 2.5r = 21.5 + 4
2.5r = 21.5 + 4

Combine like terms: 21.5 + 4 = 25.5
2.5r = 25.5

Divide each side by '2.5'.
r = 10.2

Simplifying
r = 10.2

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