1+2r=-3(-r-3)

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Solution for 1+2r=-3(-r-3) equation:


Simplifying
1 + 2r = -3(-1r + -3)

Reorder the terms:
1 + 2r = -3(-3 + -1r)
1 + 2r = (-3 * -3 + -1r * -3)
1 + 2r = (9 + 3r)

Solving
1 + 2r = 9 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
1 + 2r + -3r = 9 + 3r + -3r

Combine like terms: 2r + -3r = -1r
1 + -1r = 9 + 3r + -3r

Combine like terms: 3r + -3r = 0
1 + -1r = 9 + 0
1 + -1r = 9

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

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

Combine like terms: 9 + -1 = 8
-1r = 8

Divide each side by '-1'.
r = -8

Simplifying
r = -8

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