25=12+r

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Solution for 25=12+r equation:


Simplifying
25 = 12 + r

Solving
25 = 12 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
25 + -1r = 12 + r + -1r

Combine like terms: r + -1r = 0
25 + -1r = 12 + 0
25 + -1r = 12

Add '-25' to each side of the equation.
25 + -25 + -1r = 12 + -25

Combine like terms: 25 + -25 = 0
0 + -1r = 12 + -25
-1r = 12 + -25

Combine like terms: 12 + -25 = -13
-1r = -13

Divide each side by '-1'.
r = 13

Simplifying
r = 13

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