1-2r=-4r-9

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Solution for 1-2r=-4r-9 equation:


Simplifying
1 + -2r = -4r + -9

Reorder the terms:
1 + -2r = -9 + -4r

Solving
1 + -2r = -9 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
1 + -2r + 4r = -9 + -4r + 4r

Combine like terms: -2r + 4r = 2r
1 + 2r = -9 + -4r + 4r

Combine like terms: -4r + 4r = 0
1 + 2r = -9 + 0
1 + 2r = -9

Add '-1' to each side of the equation.
1 + -1 + 2r = -9 + -1

Combine like terms: 1 + -1 = 0
0 + 2r = -9 + -1
2r = -9 + -1

Combine like terms: -9 + -1 = -10
2r = -10

Divide each side by '2'.
r = -5

Simplifying
r = -5

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