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Simplifying 7x(8 + -4x) = 28 (8 * 7x + -4x * 7x) = 28 (56x + -28x2) = 28 Solving 56x + -28x2 = 28 Solving for variable 'x'. Reorder the terms: -28 + 56x + -28x2 = 28 + -28 Combine like terms: 28 + -28 = 0 -28 + 56x + -28x2 = 0 Factor out the Greatest Common Factor (GCF), '28'. 28(-1 + 2x + -1x2) = 0 Factor a trinomial. 28((-1 + x)(1 + -1x)) = 0 Ignore the factor 28.Subproblem 1
Set the factor '(-1 + x)' equal to zero and attempt to solve: Simplifying -1 + x = 0 Solving -1 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0 + 1 x = 0 + 1 Combine like terms: 0 + 1 = 1 x = 1 Simplifying x = 1Subproblem 2
Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1Solution
x = {1, 1}
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