r-1=2r

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Solution for r-1=2r equation:


Simplifying
r + -1 = 2r

Reorder the terms:
-1 + r = 2r

Solving
-1 + r = 2r

Solving for variable 'r'.

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

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

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

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

Add '1' to each side of the equation.
-1 + 1 + -1r = 0 + 1

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

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

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

Simplifying
r = -1

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