265=(3x+6.25)*(x+6.25)-(3x)*(x)

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Solution for 265=(3x+6.25)*(x+6.25)-(3x)*(x) equation:


Simplifying
265 = (3x + 6.25)(x + 6.25) + -1(3x)(x)

Reorder the terms:
265 = (6.25 + 3x)(x + 6.25) + -1(3x)(x)

Reorder the terms:
265 = (6.25 + 3x)(6.25 + x) + -1(3x)(x)

Multiply (6.25 + 3x) * (6.25 + x)
265 = (6.25(6.25 + x) + 3x * (6.25 + x)) + -1(3x)(x)
265 = ((6.25 * 6.25 + x * 6.25) + 3x * (6.25 + x)) + -1(3x)(x)
265 = ((39.0625 + 6.25x) + 3x * (6.25 + x)) + -1(3x)(x)
265 = (39.0625 + 6.25x + (6.25 * 3x + x * 3x)) + -1(3x)(x)
265 = (39.0625 + 6.25x + (18.75x + 3x2)) + -1(3x)(x)

Combine like terms: 6.25x + 18.75x = 25x
265 = (39.0625 + 25x + 3x2) + -1(3x)(x)

Remove parenthesis around (3x)
265 = 39.0625 + 25x + 3x2 + -1 * 3x(x)

Multiply -1 * 3
265 = 39.0625 + 25x + 3x2 + -3x * x

Multiply x * x
265 = 39.0625 + 25x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
265 = 39.0625 + 25x + 0
265 = 39.0625 + 25x

Solving
265 = 39.0625 + 25x

Solving for variable 'x'.

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

Add '-25x' to each side of the equation.
265 + -25x = 39.0625 + 25x + -25x

Combine like terms: 25x + -25x = 0
265 + -25x = 39.0625 + 0
265 + -25x = 39.0625

Add '-265' to each side of the equation.
265 + -265 + -25x = 39.0625 + -265

Combine like terms: 265 + -265 = 0
0 + -25x = 39.0625 + -265
-25x = 39.0625 + -265

Combine like terms: 39.0625 + -265 = -225.9375
-25x = -225.9375

Divide each side by '-25'.
x = 9.0375

Simplifying
x = 9.0375

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