X+x+1-3*x(x+1)+x(x)=7*x(x)

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Solution for X+x+1-3*x(x+1)+x(x)=7*x(x) equation:


Simplifying
X + x + 1 + -3x(x + 1) + x(x) = 7x(x)

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

Multiply x * x
X + x + 1 + -3x + -3x2 + x2 = 7x(x)

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

Combine like terms: x + -3x = -2x
1 + X + -2x + -3x2 + x2 = 7x(x)

Combine like terms: -3x2 + x2 = -2x2
1 + X + -2x + -2x2 = 7x(x)

Multiply x * x
1 + X + -2x + -2x2 = 7x2

Solving
1 + X + -2x + -2x2 = 7x2

Solving for variable 'X'.

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

Add '-1' to each side of the equation.
1 + X + -2x + -1 + -2x2 = -1 + 7x2

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

Combine like terms: 1 + -1 = 0
0 + X + -2x + -2x2 = -1 + 7x2
X + -2x + -2x2 = -1 + 7x2

Add '2x' to each side of the equation.
X + -2x + 2x + -2x2 = -1 + 2x + 7x2

Combine like terms: -2x + 2x = 0
X + 0 + -2x2 = -1 + 2x + 7x2
X + -2x2 = -1 + 2x + 7x2

Add '2x2' to each side of the equation.
X + -2x2 + 2x2 = -1 + 2x + 7x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
X + 0 = -1 + 2x + 7x2 + 2x2
X = -1 + 2x + 7x2 + 2x2

Combine like terms: 7x2 + 2x2 = 9x2
X = -1 + 2x + 9x2

Simplifying
X = -1 + 2x + 9x2

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