r-3.9=-9.3

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Solution for r-3.9=-9.3 equation: 


Simplifying
r + -3.9 = -9.3

Reorder the terms:
-3.9 + r = -9.3

Solving
-3.9 + r = -9.3

Solving for variable 'r'.

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

Add '3.9' to each side of the equation.
-3.9 + 3.9 + r = -9.3 + 3.9

Combine like terms: -3.9 + 3.9 = 0.0
0.0 + r = -9.3 + 3.9
r = -9.3 + 3.9

Combine like terms: -9.3 + 3.9 = -5.4
r = -5.4

Simplifying
r = -5.4

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