6378.1=r-2981.1

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Solution for 6378.1=r-2981.1 equation: 


Simplifying
6378.1 = r + -2981.1

Reorder the terms:
6378.1 = -2981.1 + r

Solving
6378.1 = -2981.1 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
6378.1 + -1r = -2981.1 + r + -1r

Combine like terms: r + -1r = 0
6378.1 + -1r = -2981.1 + 0
6378.1 + -1r = -2981.1

Add '-6378.1' to each side of the equation.
6378.1 + -6378.1 + -1r = -2981.1 + -6378.1

Combine like terms: 6378.1 + -6378.1 = 0.0
0.0 + -1r = -2981.1 + -6378.1
-1r = -2981.1 + -6378.1

Combine like terms: -2981.1 + -6378.1 = -9359.2
-1r = -9359.2

Divide each side by '-1'.
r = 9359.2

Simplifying
r = 9359.2

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