r+r-18.7=19.7

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Solution for r+r-18.7=19.7 equation: 


Simplifying
r + r + -18.7 = 19.7

Reorder the terms:
-18.7 + r + r = 19.7

Combine like terms: r + r = 2r
-18.7 + 2r = 19.7

Solving
-18.7 + 2r = 19.7

Solving for variable 'r'.

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

Add '18.7' to each side of the equation.
-18.7 + 18.7 + 2r = 19.7 + 18.7

Combine like terms: -18.7 + 18.7 = 0.0
0.0 + 2r = 19.7 + 18.7
2r = 19.7 + 18.7

Combine like terms: 19.7 + 18.7 = 38.4
2r = 38.4

Divide each side by '2'.
r = 19.2

Simplifying
r = 19.2

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