r+s+t+2r-t+3s=

Solution for r+s+t+2r-t+3s= equation:

Simplifying
r + s + t + 2r + -1t + 3s = 0

Reorder the terms:
r + 2r + s + 3s + t + -1t = 0

Combine like terms: r + 2r = 3r
3r + s + 3s + t + -1t = 0

Combine like terms: s + 3s = 4s
3r + 4s + t + -1t = 0

Combine like terms: t + -1t = 0
3r + 4s + 0 = 0
3r + 4s = 0

Solving
3r + 4s = 0

Solving for variable 'r'.

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

Add '-4s' to each side of the equation.
3r + 4s + -4s = 0 + -4s

Combine like terms: 4s + -4s = 0
3r + 0 = 0 + -4s
3r = 0 + -4s
Remove the zero:
3r = -4s

Divide each side by '3'.
r = -1.333333333s

Simplifying
r = -1.333333333s