4-10r=84

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Solution for 4-10r=84 equation: 


Simplifying
4 + -10r = 84

Solving
4 + -10r = 84

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + -10r = 84 + -4

Combine like terms: 4 + -4 = 0
0 + -10r = 84 + -4
-10r = 84 + -4

Combine like terms: 84 + -4 = 80
-10r = 80

Divide each side by '-10'.
r = -8

Simplifying
r = -8

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