103.9r*2+103.9r-31.1=0

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Solution for 103.9r*2+103.9r-31.1=0 equation:


Simplifying
103.9r * 2 + 103.9r + -31.1 = 0

Reorder the terms for easier multiplication:
103.9 * 2r + 103.9r + -31.1 = 0

Multiply 103.9 * 2
207.8r + 103.9r + -31.1 = 0

Reorder the terms:
-31.1 + 207.8r + 103.9r = 0

Combine like terms: 207.8r + 103.9r = 311.7r
-31.1 + 311.7r = 0

Solving
-31.1 + 311.7r = 0

Solving for variable 'r'.

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

Add '31.1' to each side of the equation.
-31.1 + 31.1 + 311.7r = 0 + 31.1

Combine like terms: -31.1 + 31.1 = 0.0
0.0 + 311.7r = 0 + 31.1
311.7r = 0 + 31.1

Combine like terms: 0 + 31.1 = 31.1
311.7r = 31.1

Divide each side by '311.7'.
r = 0.09977542509

Simplifying
r = 0.09977542509

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