-11=1+3r+r

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Solution for -11=1+3r+r equation:


Simplifying
-11 = 1 + 3r + r

Combine like terms: 3r + r = 4r
-11 = 1 + 4r

Solving
-11 = 1 + 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.
-11 + -4r = 1 + 4r + -4r

Combine like terms: 4r + -4r = 0
-11 + -4r = 1 + 0
-11 + -4r = 1

Add '11' to each side of the equation.
-11 + 11 + -4r = 1 + 11

Combine like terms: -11 + 11 = 0
0 + -4r = 1 + 11
-4r = 1 + 11

Combine like terms: 1 + 11 = 12
-4r = 12

Divide each side by '-4'.
r = -3

Simplifying
r = -3

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