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Simplifying 4x2 + -2x = 4x2 + -7x + -15 Reorder the terms: -2x + 4x2 = 4x2 + -7x + -15 Reorder the terms: -2x + 4x2 = -15 + -7x + 4x2 Add '-4x2' to each side of the equation. -2x + 4x2 + -4x2 = -15 + -7x + 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -2x + 0 = -15 + -7x + 4x2 + -4x2 -2x = -15 + -7x + 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -2x = -15 + -7x + 0 -2x = -15 + -7x Solving -2x = -15 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. -2x + 7x = -15 + -7x + 7x Combine like terms: -2x + 7x = 5x 5x = -15 + -7x + 7x Combine like terms: -7x + 7x = 0 5x = -15 + 0 5x = -15 Divide each side by '5'. x = -3 Simplifying x = -3
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