7x^2-x=30

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Solution for 7x^2-x=30 equation:


Simplifying
7x2 + -1x = 30

Reorder the terms:
-1x + 7x2 = 30

Solving
-1x + 7x2 = 30

Solving for variable 'x'.

Reorder the terms:
-30 + -1x + 7x2 = 30 + -30

Combine like terms: 30 + -30 = 0
-30 + -1x + 7x2 = 0

Factor a trinomial.
(-2 + -1x)(15 + -7x) = 0

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(15 + -7x)' equal to zero and attempt to solve: Simplifying 15 + -7x = 0 Solving 15 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -7x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -7x = 0 + -15 -7x = 0 + -15 Combine like terms: 0 + -15 = -15 -7x = -15 Divide each side by '-7'. x = 2.142857143 Simplifying x = 2.142857143

Solution

x = {-2, 2.142857143}

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