3x(x+7)=4x(2x-1)

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Solution for 3x(x+7)=4x(2x-1) equation:


Simplifying
3x(x + 7) = 4x(2x + -1)

Reorder the terms:
3x(7 + x) = 4x(2x + -1)
(7 * 3x + x * 3x) = 4x(2x + -1)
(21x + 3x2) = 4x(2x + -1)

Reorder the terms:
21x + 3x2 = 4x(-1 + 2x)
21x + 3x2 = (-1 * 4x + 2x * 4x)
21x + 3x2 = (-4x + 8x2)

Solving
21x + 3x2 = -4x + 8x2

Solving for variable 'x'.

Reorder the terms:
21x + 4x + 3x2 + -8x2 = -4x + 8x2 + 4x + -8x2

Combine like terms: 21x + 4x = 25x
25x + 3x2 + -8x2 = -4x + 8x2 + 4x + -8x2

Combine like terms: 3x2 + -8x2 = -5x2
25x + -5x2 = -4x + 8x2 + 4x + -8x2

Reorder the terms:
25x + -5x2 = -4x + 4x + 8x2 + -8x2

Combine like terms: -4x + 4x = 0
25x + -5x2 = 0 + 8x2 + -8x2
25x + -5x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
25x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '5x'.
5x(5 + -1x) = 0

Ignore the factor 5.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {0, 5}

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