4r-21=-33+r

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Solution for 4r-21=-33+r equation:


Simplifying
4r + -21 = -33 + r

Reorder the terms:
-21 + 4r = -33 + r

Solving
-21 + 4r = -33 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-21 + 4r + -1r = -33 + r + -1r

Combine like terms: 4r + -1r = 3r
-21 + 3r = -33 + r + -1r

Combine like terms: r + -1r = 0
-21 + 3r = -33 + 0
-21 + 3r = -33

Add '21' to each side of the equation.
-21 + 21 + 3r = -33 + 21

Combine like terms: -21 + 21 = 0
0 + 3r = -33 + 21
3r = -33 + 21

Combine like terms: -33 + 21 = -12
3r = -12

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

Simplifying
r = -4

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