4+2.50r=21.50

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Solution for 4+2.50r=21.50 equation: 


Simplifying
4 + 2.50r = 21.50

Solving
4 + 2.50r = 21.50

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 + 2.50r = 21.50 + -4

Combine like terms: 4 + -4 = 0
0 + 2.50r = 21.50 + -4
2.50r = 21.50 + -4

Combine like terms: 21.50 + -4 = 17.5
2.50r = 17.5

Divide each side by '2.50'.
r = 7

Simplifying
r = 7

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