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Simplifying 7x(4x + 3) = 7 Reorder the terms: 7x(3 + 4x) = 7 (3 * 7x + 4x * 7x) = 7 (21x + 28x2) = 7 Solving 21x + 28x2 = 7 Solving for variable 'x'. Reorder the terms: -7 + 21x + 28x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + 21x + 28x2 = 0 Factor out the Greatest Common Factor (GCF), '7'. 7(-1 + 3x + 4x2) = 0 Factor a trinomial. 7((-1 + -1x)(1 + -4x)) = 0 Ignore the factor 7.Subproblem 1
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 = -1Subproblem 2
Set the factor '(1 + -4x)' equal to zero and attempt to solve: Simplifying 1 + -4x = 0 Solving 1 + -4x = 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 + -4x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4x = 0 + -1 -4x = 0 + -1 Combine like terms: 0 + -1 = -1 -4x = -1 Divide each side by '-4'. x = 0.25 Simplifying x = 0.25Solution
x = {-1, 0.25}
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