1-2r=-15

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Solution for 1-2r=-15 equation: 


Simplifying
1 + -2r = -15

Solving
1 + -2r = -15

Solving for variable 'r'.

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

Add '-1' to each side of the equation.
1 + -1 + -2r = -15 + -1

Combine like terms: 1 + -1 = 0
0 + -2r = -15 + -1
-2r = -15 + -1

Combine like terms: -15 + -1 = -16
-2r = -16

Divide each side by '-2'.
r = 8

Simplifying
r = 8

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