r+4.2=-7.7

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Solution for r+4.2=-7.7 equation: 


Simplifying
r + 4.2 = -7.7

Reorder the terms:
4.2 + r = -7.7

Solving
4.2 + r = -7.7

Solving for variable 'r'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + r = -7.7 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + r = -7.7 + -4.2
r = -7.7 + -4.2

Combine like terms: -7.7 + -4.2 = -11.9
r = -11.9

Simplifying
r = -11.9

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