7r-4=15

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Solution for 7r-4=15 equation: 


Simplifying
7r + -4 = 15

Reorder the terms:
-4 + 7r = 15

Solving
-4 + 7r = 15

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 + 7r = 15 + 4

Combine like terms: -4 + 4 = 0
0 + 7r = 15 + 4
7r = 15 + 4

Combine like terms: 15 + 4 = 19
7r = 19

Divide each side by '7'.
r = 2.714285714

Simplifying
r = 2.714285714

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