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Simplifying (2x + -5) + 1 = 7x(-3x) + 15 Reorder the terms: (-5 + 2x) + 1 = 7x(-3x) + 15 Remove parenthesis around (-5 + 2x) -5 + 2x + 1 = 7x(-3x) + 15 Reorder the terms: -5 + 1 + 2x = 7x(-3x) + 15 Combine like terms: -5 + 1 = -4 -4 + 2x = 7x(-3x) + 15 Remove parenthesis around (-3x) -4 + 2x = 7x * -3x + 15 Reorder the terms for easier multiplication: -4 + 2x = 7 * -3x * x + 15 Multiply 7 * -3 -4 + 2x = -21x * x + 15 Multiply x * x -4 + 2x = -21x2 + 15 Reorder the terms: -4 + 2x = 15 + -21x2 Solving -4 + 2x = 15 + -21x2 Solving for variable 'x'. Reorder the terms: -4 + -15 + 2x + 21x2 = 15 + -21x2 + -15 + 21x2 Combine like terms: -4 + -15 = -19 -19 + 2x + 21x2 = 15 + -21x2 + -15 + 21x2 Reorder the terms: -19 + 2x + 21x2 = 15 + -15 + -21x2 + 21x2 Combine like terms: 15 + -15 = 0 -19 + 2x + 21x2 = 0 + -21x2 + 21x2 -19 + 2x + 21x2 = -21x2 + 21x2 Combine like terms: -21x2 + 21x2 = 0 -19 + 2x + 21x2 = 0 Factor a trinomial. (-1 + -1x)(19 + -21x) = 0Subproblem 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 '(19 + -21x)' equal to zero and attempt to solve: Simplifying 19 + -21x = 0 Solving 19 + -21x = 0 Move all terms containing x to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + -21x = 0 + -19 Combine like terms: 19 + -19 = 0 0 + -21x = 0 + -19 -21x = 0 + -19 Combine like terms: 0 + -19 = -19 -21x = -19 Divide each side by '-21'. x = 0.9047619048 Simplifying x = 0.9047619048Solution
x = {-1, 0.9047619048}
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