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Simplifying 15x + -390 = 130 + 7x Reorder the terms: -390 + 15x = 130 + 7x Solving -390 + 15x = 130 + 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. -390 + 15x + -7x = 130 + 7x + -7x Combine like terms: 15x + -7x = 8x -390 + 8x = 130 + 7x + -7x Combine like terms: 7x + -7x = 0 -390 + 8x = 130 + 0 -390 + 8x = 130 Add '390' to each side of the equation. -390 + 390 + 8x = 130 + 390 Combine like terms: -390 + 390 = 0 0 + 8x = 130 + 390 8x = 130 + 390 Combine like terms: 130 + 390 = 520 8x = 520 Divide each side by '8'. x = 65 Simplifying x = 65
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