5r-11=21+4(1-r)

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Solution for 5r-11=21+4(1-r) equation:


Simplifying
5r + -11 = 21 + 4(1 + -1r)

Reorder the terms:
-11 + 5r = 21 + 4(1 + -1r)
-11 + 5r = 21 + (1 * 4 + -1r * 4)
-11 + 5r = 21 + (4 + -4r)

Combine like terms: 21 + 4 = 25
-11 + 5r = 25 + -4r

Solving
-11 + 5r = 25 + -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 + 5r + 4r = 25 + -4r + 4r

Combine like terms: 5r + 4r = 9r
-11 + 9r = 25 + -4r + 4r

Combine like terms: -4r + 4r = 0
-11 + 9r = 25 + 0
-11 + 9r = 25

Add '11' to each side of the equation.
-11 + 11 + 9r = 25 + 11

Combine like terms: -11 + 11 = 0
0 + 9r = 25 + 11
9r = 25 + 11

Combine like terms: 25 + 11 = 36
9r = 36

Divide each side by '9'.
r = 4

Simplifying
r = 4

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