x^2-9=x^2-8x+15x

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Solution for x^2-9=x^2-8x+15x equation:


Simplifying
x2 + -9 = x2 + -8x + 15x

Reorder the terms:
-9 + x2 = x2 + -8x + 15x

Reorder the terms:
-9 + x2 = -8x + 15x + x2

Combine like terms: -8x + 15x = 7x
-9 + x2 = 7x + x2

Add '-1x2' to each side of the equation.
-9 + x2 + -1x2 = 7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-9 + 0 = 7x + x2 + -1x2
-9 = 7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-9 = 7x + 0
-9 = 7x

Solving
-9 = 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-9 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
-9 + -7x = 0

Add '9' to each side of the equation.
-9 + 9 + -7x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -7x = 0 + 9
-7x = 0 + 9

Combine like terms: 0 + 9 = 9
-7x = 9

Divide each side by '-7'.
x = -1.285714286

Simplifying
x = -1.285714286

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