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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 = 0Subproblem 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 = 7Solution
x = {0, 7}
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