8r-(3r-6)-(r-7)=

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Solution for 8r-(3r-6)-(r-7)= equation:


Simplifying
8r + -1(3r + -6) + -1(r + -7) = 0

Reorder the terms:
8r + -1(-6 + 3r) + -1(r + -7) = 0
8r + (-6 * -1 + 3r * -1) + -1(r + -7) = 0
8r + (6 + -3r) + -1(r + -7) = 0

Reorder the terms:
8r + 6 + -3r + -1(-7 + r) = 0
8r + 6 + -3r + (-7 * -1 + r * -1) = 0
8r + 6 + -3r + (7 + -1r) = 0

Reorder the terms:
6 + 7 + 8r + -3r + -1r = 0

Combine like terms: 6 + 7 = 13
13 + 8r + -3r + -1r = 0

Combine like terms: 8r + -3r = 5r
13 + 5r + -1r = 0

Combine like terms: 5r + -1r = 4r
13 + 4r = 0

Solving
13 + 4r = 0

Solving for variable 'r'.

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

Add '-13' to each side of the equation.
13 + -13 + 4r = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 4r = 0 + -13
4r = 0 + -13

Combine like terms: 0 + -13 = -13
4r = -13

Divide each side by '4'.
r = -3.25

Simplifying
r = -3.25

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