15-(r-6)=6-(3r+5)

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Solution for 15-(r-6)=6-(3r+5) equation:


Simplifying
15 + -1(r + -6) = 6 + -1(3r + 5)

Reorder the terms:
15 + -1(-6 + r) = 6 + -1(3r + 5)
15 + (-6 * -1 + r * -1) = 6 + -1(3r + 5)
15 + (6 + -1r) = 6 + -1(3r + 5)

Combine like terms: 15 + 6 = 21
21 + -1r = 6 + -1(3r + 5)

Reorder the terms:
21 + -1r = 6 + -1(5 + 3r)
21 + -1r = 6 + (5 * -1 + 3r * -1)
21 + -1r = 6 + (-5 + -3r)

Combine like terms: 6 + -5 = 1
21 + -1r = 1 + -3r

Solving
21 + -1r = 1 + -3r

Solving for variable 'r'.

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

Add '3r' to each side of the equation.
21 + -1r + 3r = 1 + -3r + 3r

Combine like terms: -1r + 3r = 2r
21 + 2r = 1 + -3r + 3r

Combine like terms: -3r + 3r = 0
21 + 2r = 1 + 0
21 + 2r = 1

Add '-21' to each side of the equation.
21 + -21 + 2r = 1 + -21

Combine like terms: 21 + -21 = 0
0 + 2r = 1 + -21
2r = 1 + -21

Combine like terms: 1 + -21 = -20
2r = -20

Divide each side by '2'.
r = -10

Simplifying
r = -10

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