21x^2-46x=7

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Solution for 21x^2-46x=7 equation:


Simplifying
21x2 + -46x = 7

Reorder the terms:
-46x + 21x2 = 7

Solving
-46x + 21x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + -46x + 21x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -46x + 21x2 = 0

Factor a trinomial.
(-1 + -7x)(7 + -3x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(7 + -3x)' equal to zero and attempt to solve: Simplifying 7 + -3x = 0 Solving 7 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -3x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 0 + -7 -3x = 0 + -7 Combine like terms: 0 + -7 = -7 -3x = -7 Divide each side by '-3'. x = 2.333333333 Simplifying x = 2.333333333

Solution

x = {-0.1428571429, 2.333333333}

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