3r-8=4

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Solution for 3r-8=4 equation: 


Simplifying
3r + -8 = 4

Reorder the terms:
-8 + 3r = 4

Solving
-8 + 3r = 4

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 + 3r = 4 + 8

Combine like terms: -8 + 8 = 0
0 + 3r = 4 + 8
3r = 4 + 8

Combine like terms: 4 + 8 = 12
3r = 12

Divide each side by '3'.
r = 4

Simplifying
r = 4

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