-x^2=7-8x

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Solution for -x^2=7-8x equation:


Simplifying
-1x2 = 7 + -8x

Solving
-1x2 = 7 + -8x

Solving for variable 'x'.

Reorder the terms:
-7 + 8x + -1x2 = 7 + -8x + -7 + 8x

Reorder the terms:
-7 + 8x + -1x2 = 7 + -7 + -8x + 8x

Combine like terms: 7 + -7 = 0
-7 + 8x + -1x2 = 0 + -8x + 8x
-7 + 8x + -1x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-7 + 8x + -1x2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

x = {7, 1}

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