7x^2-10x=6x^2-21

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Solution for 7x^2-10x=6x^2-21 equation:


Simplifying
7x2 + -10x = 6x2 + -21

Reorder the terms:
-10x + 7x2 = 6x2 + -21

Reorder the terms:
-10x + 7x2 = -21 + 6x2

Solving
-10x + 7x2 = -21 + 6x2

Solving for variable 'x'.

Reorder the terms:
21 + -10x + 7x2 + -6x2 = -21 + 6x2 + 21 + -6x2

Combine like terms: 7x2 + -6x2 = 1x2
21 + -10x + 1x2 = -21 + 6x2 + 21 + -6x2

Reorder the terms:
21 + -10x + 1x2 = -21 + 21 + 6x2 + -6x2

Combine like terms: -21 + 21 = 0
21 + -10x + 1x2 = 0 + 6x2 + -6x2
21 + -10x + 1x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
21 + -10x + 1x2 = 0

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

Subproblem 1

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

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {3, 7}

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