8.2=4+2r

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Solution for 8.2=4+2r equation:


Simplifying
8.2 = 4 + 2r

Solving
8.2 = 4 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
8.2 + -2r = 4 + 2r + -2r

Combine like terms: 2r + -2r = 0
8.2 + -2r = 4 + 0
8.2 + -2r = 4

Add '-8.2' to each side of the equation.
8.2 + -8.2 + -2r = 4 + -8.2

Combine like terms: 8.2 + -8.2 = 0.0
0.0 + -2r = 4 + -8.2
-2r = 4 + -8.2

Combine like terms: 4 + -8.2 = -4.2
-2r = -4.2

Divide each side by '-2'.
r = 2.1

Simplifying
r = 2.1

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