8x-(7x^2+3)=7(5-x)(3+x)

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Solution for 8x-(7x^2+3)=7(5-x)(3+x) equation:


Simplifying
8x + -1(7x2 + 3) = 7(5 + -1x)(3 + x)

Reorder the terms:
8x + -1(3 + 7x2) = 7(5 + -1x)(3 + x)
8x + (3 * -1 + 7x2 * -1) = 7(5 + -1x)(3 + x)
8x + (-3 + -7x2) = 7(5 + -1x)(3 + x)

Reorder the terms:
-3 + 8x + -7x2 = 7(5 + -1x)(3 + x)

Multiply (5 + -1x) * (3 + x)
-3 + 8x + -7x2 = 7(5(3 + x) + -1x * (3 + x))
-3 + 8x + -7x2 = 7((3 * 5 + x * 5) + -1x * (3 + x))
-3 + 8x + -7x2 = 7((15 + 5x) + -1x * (3 + x))
-3 + 8x + -7x2 = 7(15 + 5x + (3 * -1x + x * -1x))
-3 + 8x + -7x2 = 7(15 + 5x + (-3x + -1x2))

Combine like terms: 5x + -3x = 2x
-3 + 8x + -7x2 = 7(15 + 2x + -1x2)
-3 + 8x + -7x2 = (15 * 7 + 2x * 7 + -1x2 * 7)
-3 + 8x + -7x2 = (105 + 14x + -7x2)

Add '7x2' to each side of the equation.
-3 + 8x + -7x2 + 7x2 = 105 + 14x + -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-3 + 8x + 0 = 105 + 14x + -7x2 + 7x2
-3 + 8x = 105 + 14x + -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-3 + 8x = 105 + 14x + 0
-3 + 8x = 105 + 14x

Solving
-3 + 8x = 105 + 14x

Solving for variable 'x'.

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

Add '-14x' to each side of the equation.
-3 + 8x + -14x = 105 + 14x + -14x

Combine like terms: 8x + -14x = -6x
-3 + -6x = 105 + 14x + -14x

Combine like terms: 14x + -14x = 0
-3 + -6x = 105 + 0
-3 + -6x = 105

Add '3' to each side of the equation.
-3 + 3 + -6x = 105 + 3

Combine like terms: -3 + 3 = 0
0 + -6x = 105 + 3
-6x = 105 + 3

Combine like terms: 105 + 3 = 108
-6x = 108

Divide each side by '-6'.
x = -18

Simplifying
x = -18

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