(x+7)(x-3)=(x+1)2nd

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Solution for (x+7)(x-3)=(x+1)2nd equation:


Simplifying
(x + 7)(x + -3) = (x + 1) * 2nd

Reorder the terms:
(7 + x)(x + -3) = (x + 1) * 2nd

Reorder the terms:
(7 + x)(-3 + x) = (x + 1) * 2nd

Multiply (7 + x) * (-3 + x)
(7(-3 + x) + x(-3 + x)) = (x + 1) * 2nd
((-3 * 7 + x * 7) + x(-3 + x)) = (x + 1) * 2nd
((-21 + 7x) + x(-3 + x)) = (x + 1) * 2nd
(-21 + 7x + (-3 * x + x * x)) = (x + 1) * 2nd
(-21 + 7x + (-3x + x2)) = (x + 1) * 2nd

Combine like terms: 7x + -3x = 4x
(-21 + 4x + x2) = (x + 1) * 2nd

Reorder the terms:
-21 + 4x + x2 = (1 + x) * 2nd

Reorder the terms for easier multiplication:
-21 + 4x + x2 = 2dn(1 + x)
-21 + 4x + x2 = (1 * 2dn + x * 2dn)
-21 + 4x + x2 = (2dn + 2dnx)

Solving
-21 + 4x + x2 = 2dn + 2dnx

Solving for variable 'x'.

Reorder the terms:
-21 + -2dn + -2dnx + 4x + x2 = 2dn + 2dnx + -2dn + -2dnx

Reorder the terms:
-21 + -2dn + -2dnx + 4x + x2 = 2dn + -2dn + 2dnx + -2dnx

Combine like terms: 2dn + -2dn = 0
-21 + -2dn + -2dnx + 4x + x2 = 0 + 2dnx + -2dnx
-21 + -2dn + -2dnx + 4x + x2 = 2dnx + -2dnx

Combine like terms: 2dnx + -2dnx = 0
-21 + -2dn + -2dnx + 4x + x2 = 0

The solution to this equation could not be determined.

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