12-3r+20+6r=3-8r+2+15r

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Solution for 12-3r+20+6r=3-8r+2+15r equation:


Simplifying
12 + -3r + 20 + 6r = 3 + -8r + 2 + 15r

Reorder the terms:
12 + 20 + -3r + 6r = 3 + -8r + 2 + 15r

Combine like terms: 12 + 20 = 32
32 + -3r + 6r = 3 + -8r + 2 + 15r

Combine like terms: -3r + 6r = 3r
32 + 3r = 3 + -8r + 2 + 15r

Reorder the terms:
32 + 3r = 3 + 2 + -8r + 15r

Combine like terms: 3 + 2 = 5
32 + 3r = 5 + -8r + 15r

Combine like terms: -8r + 15r = 7r
32 + 3r = 5 + 7r

Solving
32 + 3r = 5 + 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
32 + 3r + -7r = 5 + 7r + -7r

Combine like terms: 3r + -7r = -4r
32 + -4r = 5 + 7r + -7r

Combine like terms: 7r + -7r = 0
32 + -4r = 5 + 0
32 + -4r = 5

Add '-32' to each side of the equation.
32 + -32 + -4r = 5 + -32

Combine like terms: 32 + -32 = 0
0 + -4r = 5 + -32
-4r = 5 + -32

Combine like terms: 5 + -32 = -27
-4r = -27

Divide each side by '-4'.
r = 6.75

Simplifying
r = 6.75

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