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Simplifying 7x2 = 42 + 7x Solving 7x2 = 42 + 7x Solving for variable 'x'. Reorder the terms: -42 + -7x + 7x2 = 42 + 7x + -42 + -7x Reorder the terms: -42 + -7x + 7x2 = 42 + -42 + 7x + -7x Combine like terms: 42 + -42 = 0 -42 + -7x + 7x2 = 0 + 7x + -7x -42 + -7x + 7x2 = 7x + -7x Combine like terms: 7x + -7x = 0 -42 + -7x + 7x2 = 0 Factor out the Greatest Common Factor (GCF), '7'. 7(-6 + -1x + x2) = 0 Factor a trinomial. 7((-2 + -1x)(3 + -1x)) = 0 Ignore the factor 7.Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3Solution
x = {-2, 3}
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