=(4x)*(7-x)

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Solution for =(4x)*(7-x) equation:


Simplifying
0 = (4x)(7 + -1x)

Remove parenthesis around (4x)
0 = 4x(7 + -1x)
0 = (7 * 4x + -1x * 4x)
0 = (28x + -4x2)

Solving
0 = 28x + -4x2

Solving for variable 'x'.
Remove the zero:
-28x + 4x2 = 28x + -4x2 + -28x + 4x2

Reorder the terms:
-28x + 4x2 = 28x + -28x + -4x2 + 4x2

Combine like terms: 28x + -28x = 0
-28x + 4x2 = 0 + -4x2 + 4x2
-28x + 4x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
-28x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '4x'.
4x(-7 + x) = 0

Ignore the factor 4.

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 '(-7 + x)' equal to zero and attempt to solve: Simplifying -7 + x = 0 Solving -7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + x = 0 + 7 x = 0 + 7 Combine like terms: 0 + 7 = 7 x = 7 Simplifying x = 7

Solution

x = {0, 7}

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