8q^2-5q=7q^2-7q+15

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Solution for 8q^2-5q=7q^2-7q+15 equation:


Simplifying
8q2 + -5q = 7q2 + -7q + 15

Reorder the terms:
-5q + 8q2 = 7q2 + -7q + 15

Reorder the terms:
-5q + 8q2 = 15 + -7q + 7q2

Solving
-5q + 8q2 = 15 + -7q + 7q2

Solving for variable 'q'.

Reorder the terms:
-15 + -5q + 7q + 8q2 + -7q2 = 15 + -7q + 7q2 + -15 + 7q + -7q2

Combine like terms: -5q + 7q = 2q
-15 + 2q + 8q2 + -7q2 = 15 + -7q + 7q2 + -15 + 7q + -7q2

Combine like terms: 8q2 + -7q2 = 1q2
-15 + 2q + 1q2 = 15 + -7q + 7q2 + -15 + 7q + -7q2

Reorder the terms:
-15 + 2q + 1q2 = 15 + -15 + -7q + 7q + 7q2 + -7q2

Combine like terms: 15 + -15 = 0
-15 + 2q + 1q2 = 0 + -7q + 7q + 7q2 + -7q2
-15 + 2q + 1q2 = -7q + 7q + 7q2 + -7q2

Combine like terms: -7q + 7q = 0
-15 + 2q + 1q2 = 0 + 7q2 + -7q2
-15 + 2q + 1q2 = 7q2 + -7q2

Combine like terms: 7q2 + -7q2 = 0
-15 + 2q + 1q2 = 0

Factor a trinomial.
(-5 + -1q)(3 + -1q) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(3 + -1q)' equal to zero and attempt to solve: Simplifying 3 + -1q = 0 Solving 3 + -1q = 0 Move all terms containing q to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1q = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1q = 0 + -3 -1q = 0 + -3 Combine like terms: 0 + -3 = -3 -1q = -3 Divide each side by '-1'. q = 3 Simplifying q = 3

Solution

q = {-5, 3}

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