8+2r-1=6r+15-2r

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Solution for 8+2r-1=6r+15-2r equation:


Simplifying
8 + 2r + -1 = 6r + 15 + -2r

Reorder the terms:
8 + -1 + 2r = 6r + 15 + -2r

Combine like terms: 8 + -1 = 7
7 + 2r = 6r + 15 + -2r

Reorder the terms:
7 + 2r = 15 + 6r + -2r

Combine like terms: 6r + -2r = 4r
7 + 2r = 15 + 4r

Solving
7 + 2r = 15 + 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.
7 + 2r + -4r = 15 + 4r + -4r

Combine like terms: 2r + -4r = -2r
7 + -2r = 15 + 4r + -4r

Combine like terms: 4r + -4r = 0
7 + -2r = 15 + 0
7 + -2r = 15

Add '-7' to each side of the equation.
7 + -7 + -2r = 15 + -7

Combine like terms: 7 + -7 = 0
0 + -2r = 15 + -7
-2r = 15 + -7

Combine like terms: 15 + -7 = 8
-2r = 8

Divide each side by '-2'.
r = -4

Simplifying
r = -4

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