7+r=25

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Solution for 7+r=25 equation: 


Simplifying
7 + r = 25

Solving
7 + r = 25

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + r = 25 + -7

Combine like terms: 7 + -7 = 0
0 + r = 25 + -7
r = 25 + -7

Combine like terms: 25 + -7 = 18
r = 18

Simplifying
r = 18

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