2.2r-12=3.4

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Solution for 2.2r-12=3.4 equation: 


Simplifying
2.2r + -12 = 3.4

Reorder the terms:
-12 + 2.2r = 3.4

Solving
-12 + 2.2r = 3.4

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + 2.2r = 3.4 + 12

Combine like terms: -12 + 12 = 0
0 + 2.2r = 3.4 + 12
2.2r = 3.4 + 12

Combine like terms: 3.4 + 12 = 15.4
2.2r = 15.4

Divide each side by '2.2'.
r = 7

Simplifying
r = 7

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