7r^2-39r+5=-3r

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Solution for 7r^2-39r+5=-3r equation:


Simplifying
7r2 + -39r + 5 = -3r

Reorder the terms:
5 + -39r + 7r2 = -3r

Solving
5 + -39r + 7r2 = -3r

Solving for variable 'r'.

Reorder the terms:
5 + -39r + 3r + 7r2 = -3r + 3r

Combine like terms: -39r + 3r = -36r
5 + -36r + 7r2 = -3r + 3r

Combine like terms: -3r + 3r = 0
5 + -36r + 7r2 = 0

Factor a trinomial.
(1 + -7r)(5 + -1r) = 0

Subproblem 1

Set the factor '(1 + -7r)' equal to zero and attempt to solve: Simplifying 1 + -7r = 0 Solving 1 + -7r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -7r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -7r = 0 + -1 -7r = 0 + -1 Combine like terms: 0 + -1 = -1 -7r = -1 Divide each side by '-7'. r = 0.1428571429 Simplifying r = 0.1428571429

Subproblem 2

Set the factor '(5 + -1r)' equal to zero and attempt to solve: Simplifying 5 + -1r = 0 Solving 5 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1r = 0 + -5 -1r = 0 + -5 Combine like terms: 0 + -5 = -5 -1r = -5 Divide each side by '-1'. r = 5 Simplifying r = 5

Solution

r = {0.1428571429, 5}

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