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Simplifying 3x + -15 = 7x + -9 Reorder the terms: -15 + 3x = 7x + -9 Reorder the terms: -15 + 3x = -9 + 7x Solving -15 + 3x = -9 + 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. -15 + 3x + -7x = -9 + 7x + -7x Combine like terms: 3x + -7x = -4x -15 + -4x = -9 + 7x + -7x Combine like terms: 7x + -7x = 0 -15 + -4x = -9 + 0 -15 + -4x = -9 Add '15' to each side of the equation. -15 + 15 + -4x = -9 + 15 Combine like terms: -15 + 15 = 0 0 + -4x = -9 + 15 -4x = -9 + 15 Combine like terms: -9 + 15 = 6 -4x = 6 Divide each side by '-4'. x = -1.5 Simplifying x = -1.5
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