(r-5)-7.9=2.1

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Solution for (r-5)-7.9=2.1 equation:


Simplifying
(r + -5) + -7.9 = 2.1

Reorder the terms:
(-5 + r) + -7.9 = 2.1

Remove parenthesis around (-5 + r)
-5 + r + -7.9 = 2.1

Reorder the terms:
-5 + -7.9 + r = 2.1

Combine like terms: -5 + -7.9 = -12.9
-12.9 + r = 2.1

Solving
-12.9 + r = 2.1

Solving for variable 'r'.

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

Add '12.9' to each side of the equation.
-12.9 + 12.9 + r = 2.1 + 12.9

Combine like terms: -12.9 + 12.9 = 0.0
0.0 + r = 2.1 + 12.9
r = 2.1 + 12.9

Combine like terms: 2.1 + 12.9 = 15
r = 15

Simplifying
r = 15

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