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Simplifying 13x + 390 = 7x Reorder the terms: 390 + 13x = 7x Solving 390 + 13x = 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 + 13x + -7x = 7x + -7x Combine like terms: 13x + -7x = 6x 390 + 6x = 7x + -7x Combine like terms: 7x + -7x = 0 390 + 6x = 0 Add '-390' to each side of the equation. 390 + -390 + 6x = 0 + -390 Combine like terms: 390 + -390 = 0 0 + 6x = 0 + -390 6x = 0 + -390 Combine like terms: 0 + -390 = -390 6x = -390 Divide each side by '6'. x = -65 Simplifying x = -65
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