5r-18=-21+4r

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Solution for 5r-18=-21+4r equation:


Simplifying
5r + -18 = -21 + 4r

Reorder the terms:
-18 + 5r = -21 + 4r

Solving
-18 + 5r = -21 + 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.
-18 + 5r + -4r = -21 + 4r + -4r

Combine like terms: 5r + -4r = 1r
-18 + 1r = -21 + 4r + -4r

Combine like terms: 4r + -4r = 0
-18 + 1r = -21 + 0
-18 + 1r = -21

Add '18' to each side of the equation.
-18 + 18 + 1r = -21 + 18

Combine like terms: -18 + 18 = 0
0 + 1r = -21 + 18
1r = -21 + 18

Combine like terms: -21 + 18 = -3
1r = -3

Divide each side by '1'.
r = -3

Simplifying
r = -3

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