-3r+(-13r)+10r-(-r)=20

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Solution for -3r+(-13r)+10r-(-r)=20 equation:


Simplifying
-3r + (-13r) + 10r + -1(-1r) = 20

Remove parenthesis around (-1r)
-3r + (-13r) + 10r + -1 * -1r = 20

Multiply -1 * -1
-3r + (-13r) + 10r + 1r = 20

Combine like terms: -3r + (-13r) = -16r
-16r + 10r + 1r = 20

Combine like terms: -16r + 10r = -6r
-6r + 1r = 20

Combine like terms: -6r + 1r = -5r
-5r = 20

Solving
-5r = 20

Solving for variable 'r'.

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

Divide each side by '-5'.
r = -4

Simplifying
r = -4

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