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Simplifying 7x + 3 = 9x + -15 Reorder the terms: 3 + 7x = 9x + -15 Reorder the terms: 3 + 7x = -15 + 9x Solving 3 + 7x = -15 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 3 + 7x + -9x = -15 + 9x + -9x Combine like terms: 7x + -9x = -2x 3 + -2x = -15 + 9x + -9x Combine like terms: 9x + -9x = 0 3 + -2x = -15 + 0 3 + -2x = -15 Add '-3' to each side of the equation. 3 + -3 + -2x = -15 + -3 Combine like terms: 3 + -3 = 0 0 + -2x = -15 + -3 -2x = -15 + -3 Combine like terms: -15 + -3 = -18 -2x = -18 Divide each side by '-2'. x = 9 Simplifying x = 9
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