(x^2+8x+7)-(x^2-2x+1)=36

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Solution for (x^2+8x+7)-(x^2-2x+1)=36 equation:


Simplifying
(x2 + 8x + 7) + -1(x2 + -2x + 1) = 36

Reorder the terms:
(7 + 8x + x2) + -1(x2 + -2x + 1) = 36

Remove parenthesis around (7 + 8x + x2)
7 + 8x + x2 + -1(x2 + -2x + 1) = 36

Reorder the terms:
7 + 8x + x2 + -1(1 + -2x + x2) = 36
7 + 8x + x2 + (1 * -1 + -2x * -1 + x2 * -1) = 36
7 + 8x + x2 + (-1 + 2x + -1x2) = 36

Reorder the terms:
7 + -1 + 8x + 2x + x2 + -1x2 = 36

Combine like terms: 7 + -1 = 6
6 + 8x + 2x + x2 + -1x2 = 36

Combine like terms: 8x + 2x = 10x
6 + 10x + x2 + -1x2 = 36

Combine like terms: x2 + -1x2 = 0
6 + 10x + 0 = 36
6 + 10x = 36

Solving
6 + 10x = 36

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 10x = 36 + -6

Combine like terms: 6 + -6 = 0
0 + 10x = 36 + -6
10x = 36 + -6

Combine like terms: 36 + -6 = 30
10x = 30

Divide each side by '10'.
x = 3

Simplifying
x = 3

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