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Simplifying 7x2 = 25 + -30x Solving 7x2 = 25 + -30x Solving for variable 'x'. Reorder the terms: -25 + 30x + 7x2 = 25 + -30x + -25 + 30x Reorder the terms: -25 + 30x + 7x2 = 25 + -25 + -30x + 30x Combine like terms: 25 + -25 = 0 -25 + 30x + 7x2 = 0 + -30x + 30x -25 + 30x + 7x2 = -30x + 30x Combine like terms: -30x + 30x = 0 -25 + 30x + 7x2 = 0 Factor a trinomial. (-5 + -1x)(5 + -7x) = 0Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5Subproblem 2
Set the factor '(5 + -7x)' equal to zero and attempt to solve: Simplifying 5 + -7x = 0 Solving 5 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7x = 0 + -5 -7x = 0 + -5 Combine like terms: 0 + -5 = -5 -7x = -5 Divide each side by '-7'. x = 0.7142857143 Simplifying x = 0.7142857143Solution
x = {-5, 0.7142857143}
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