(7r+8)-(r+1)=

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Solution for (7r+8)-(r+1)= equation:


Simplifying
(7r + 8) + -1(r + 1) = 0

Reorder the terms:
(8 + 7r) + -1(r + 1) = 0

Remove parenthesis around (8 + 7r)
8 + 7r + -1(r + 1) = 0

Reorder the terms:
8 + 7r + -1(1 + r) = 0
8 + 7r + (1 * -1 + r * -1) = 0
8 + 7r + (-1 + -1r) = 0

Reorder the terms:
8 + -1 + 7r + -1r = 0

Combine like terms: 8 + -1 = 7
7 + 7r + -1r = 0

Combine like terms: 7r + -1r = 6r
7 + 6r = 0

Solving
7 + 6r = 0

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + 6r = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 6r = 0 + -7
6r = 0 + -7

Combine like terms: 0 + -7 = -7
6r = -7

Divide each side by '6'.
r = -1.166666667

Simplifying
r = -1.166666667

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