10-r=15

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Solution for 10-r=15 equation: 


Simplifying
10 + -1r = 15

Solving
10 + -1r = 15

Solving for variable 'r'.

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

Add '-10' to each side of the equation.
10 + -10 + -1r = 15 + -10

Combine like terms: 10 + -10 = 0
0 + -1r = 15 + -10
-1r = 15 + -10

Combine like terms: 15 + -10 = 5
-1r = 5

Divide each side by '-1'.
r = -5

Simplifying
r = -5

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