-7(r+1)-2=2+(r-1)

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Solution for -7(r+1)-2=2+(r-1) equation:


Simplifying
-7(r + 1) + -2 = 2 + (r + -1)

Reorder the terms:
-7(1 + r) + -2 = 2 + (r + -1)
(1 * -7 + r * -7) + -2 = 2 + (r + -1)
(-7 + -7r) + -2 = 2 + (r + -1)

Reorder the terms:
-7 + -2 + -7r = 2 + (r + -1)

Combine like terms: -7 + -2 = -9
-9 + -7r = 2 + (r + -1)

Reorder the terms:
-9 + -7r = 2 + (-1 + r)

Remove parenthesis around (-1 + r)
-9 + -7r = 2 + -1 + r

Combine like terms: 2 + -1 = 1
-9 + -7r = 1 + r

Solving
-9 + -7r = 1 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-9 + -7r + -1r = 1 + r + -1r

Combine like terms: -7r + -1r = -8r
-9 + -8r = 1 + r + -1r

Combine like terms: r + -1r = 0
-9 + -8r = 1 + 0
-9 + -8r = 1

Add '9' to each side of the equation.
-9 + 9 + -8r = 1 + 9

Combine like terms: -9 + 9 = 0
0 + -8r = 1 + 9
-8r = 1 + 9

Combine like terms: 1 + 9 = 10
-8r = 10

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

Simplifying
r = -1.25

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