r-4.2=10.9

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Solution for r-4.2=10.9 equation: 


Simplifying
r + -4.2 = 10.9

Reorder the terms:
-4.2 + r = 10.9

Solving
-4.2 + r = 10.9

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 = 10.9 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + r = 10.9 + 4.2
r = 10.9 + 4.2

Combine like terms: 10.9 + 4.2 = 15.1
r = 15.1

Simplifying
r = 15.1

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