4r+8=12

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Solution for 4r+8=12 equation: 


Simplifying
4r + 8 = 12

Reorder the terms:
8 + 4r = 12

Solving
8 + 4r = 12

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 4r = 12 + -8

Combine like terms: 8 + -8 = 0
0 + 4r = 12 + -8
4r = 12 + -8

Combine like terms: 12 + -8 = 4
4r = 4

Divide each side by '4'.
r = 1

Simplifying
r = 1

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