-13-r=7+6(r-8)+1

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Solution for -13-r=7+6(r-8)+1 equation:


Simplifying
-13 + -1r = 7 + 6(r + -8) + 1

Reorder the terms:
-13 + -1r = 7 + 6(-8 + r) + 1
-13 + -1r = 7 + (-8 * 6 + r * 6) + 1
-13 + -1r = 7 + (-48 + 6r) + 1

Reorder the terms:
-13 + -1r = 7 + -48 + 1 + 6r

Combine like terms: 7 + -48 = -41
-13 + -1r = -41 + 1 + 6r

Combine like terms: -41 + 1 = -40
-13 + -1r = -40 + 6r

Solving
-13 + -1r = -40 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
-13 + -1r + -6r = -40 + 6r + -6r

Combine like terms: -1r + -6r = -7r
-13 + -7r = -40 + 6r + -6r

Combine like terms: 6r + -6r = 0
-13 + -7r = -40 + 0
-13 + -7r = -40

Add '13' to each side of the equation.
-13 + 13 + -7r = -40 + 13

Combine like terms: -13 + 13 = 0
0 + -7r = -40 + 13
-7r = -40 + 13

Combine like terms: -40 + 13 = -27
-7r = -27

Divide each side by '-7'.
r = 3.857142857

Simplifying
r = 3.857142857

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