-4r+11=4r+21

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Solution for -4r+11=4r+21 equation: 


Simplifying
-4r + 11 = 4r + 21

Reorder the terms:
11 + -4r = 4r + 21

Reorder the terms:
11 + -4r = 21 + 4r

Solving
11 + -4r = 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.
11 + -4r + -4r = 21 + 4r + -4r

Combine like terms: -4r + -4r = -8r
11 + -8r = 21 + 4r + -4r

Combine like terms: 4r + -4r = 0
11 + -8r = 21 + 0
11 + -8r = 21

Add '-11' to each side of the equation.
11 + -11 + -8r = 21 + -11

Combine like terms: 11 + -11 = 0
0 + -8r = 21 + -11
-8r = 21 + -11

Combine like terms: 21 + -11 = 10
-8r = 10

Divide each side by '-8'.
r = -1.25

Simplifying
r = -1.25

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