x^2+8x+c=23

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Solution for x^2+8x+c=23 equation:


Simplifying
x2 + 8x + c = 23

Reorder the terms:
c + 8x + x2 = 23

Solving
c + 8x + x2 = 23

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '-8x' to each side of the equation.
c + 8x + -8x + x2 = 23 + -8x

Combine like terms: 8x + -8x = 0
c + 0 + x2 = 23 + -8x
c + x2 = 23 + -8x

Add '-1x2' to each side of the equation.
c + x2 + -1x2 = 23 + -8x + -1x2

Combine like terms: x2 + -1x2 = 0
c + 0 = 23 + -8x + -1x2
c = 23 + -8x + -1x2

Simplifying
c = 23 + -8x + -1x2

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