39=7(2r-7)+r

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Solution for 39=7(2r-7)+r equation:


Simplifying
39 = 7(2r + -7) + r

Reorder the terms:
39 = 7(-7 + 2r) + r
39 = (-7 * 7 + 2r * 7) + r
39 = (-49 + 14r) + r

Combine like terms: 14r + r = 15r
39 = -49 + 15r

Solving
39 = -49 + 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
39 + -15r = -49 + 15r + -15r

Combine like terms: 15r + -15r = 0
39 + -15r = -49 + 0
39 + -15r = -49

Add '-39' to each side of the equation.
39 + -39 + -15r = -49 + -39

Combine like terms: 39 + -39 = 0
0 + -15r = -49 + -39
-15r = -49 + -39

Combine like terms: -49 + -39 = -88
-15r = -88

Divide each side by '-15'.
r = 5.866666667

Simplifying
r = 5.866666667

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