r-2.9=-5.7

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Solution for r-2.9=-5.7 equation: 


Simplifying
r + -2.9 = -5.7

Reorder the terms:
-2.9 + r = -5.7

Solving
-2.9 + r = -5.7

Solving for variable 'r'.

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

Add '2.9' to each side of the equation.
-2.9 + 2.9 + r = -5.7 + 2.9

Combine like terms: -2.9 + 2.9 = 0.0
0.0 + r = -5.7 + 2.9
r = -5.7 + 2.9

Combine like terms: -5.7 + 2.9 = -2.8
r = -2.8

Simplifying
r = -2.8

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