1-2r+r=-4

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Solution for 1-2r+r=-4 equation: 


Simplifying
1 + -2r + r = -4

Combine like terms: -2r + r = -1r
1 + -1r = -4

Solving
1 + -1r = -4

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 + -1r = -4 + -1

Combine like terms: 1 + -1 = 0
0 + -1r = -4 + -1
-1r = -4 + -1

Combine like terms: -4 + -1 = -5
-1r = -5

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

Simplifying
r = 5

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