2+4r=30

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Solution for 2+4r=30 equation: 


Simplifying
2 + 4r = 30

Solving
2 + 4r = 30

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + 4r = 30 + -2

Combine like terms: 2 + -2 = 0
0 + 4r = 30 + -2
4r = 30 + -2

Combine like terms: 30 + -2 = 28
4r = 28

Divide each side by '4'.
r = 7

Simplifying
r = 7

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