10r-84=

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Solution for 10r-84= equation: 


Simplifying
10r + -84 = 0

Reorder the terms:
-84 + 10r = 0

Solving
-84 + 10r = 0

Solving for variable 'r'.

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

Add '84' to each side of the equation.
-84 + 84 + 10r = 0 + 84

Combine like terms: -84 + 84 = 0
0 + 10r = 0 + 84
10r = 0 + 84

Combine like terms: 0 + 84 = 84
10r = 84

Divide each side by '10'.
r = 8.4

Simplifying
r = 8.4

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