25=9+4r

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Solution for 25=9+4r equation:


Simplifying
25 = 9 + 4r

Solving
25 = 9 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
25 + -4r = 9 + 4r + -4r

Combine like terms: 4r + -4r = 0
25 + -4r = 9 + 0
25 + -4r = 9

Add '-25' to each side of the equation.
25 + -25 + -4r = 9 + -25

Combine like terms: 25 + -25 = 0
0 + -4r = 9 + -25
-4r = 9 + -25

Combine like terms: 9 + -25 = -16
-4r = -16

Divide each side by '-4'.
r = 4

Simplifying
r = 4

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