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Simplifying 13x + -87 = 7x + -45 Reorder the terms: -87 + 13x = 7x + -45 Reorder the terms: -87 + 13x = -45 + 7x Solving -87 + 13x = -45 + 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. -87 + 13x + -7x = -45 + 7x + -7x Combine like terms: 13x + -7x = 6x -87 + 6x = -45 + 7x + -7x Combine like terms: 7x + -7x = 0 -87 + 6x = -45 + 0 -87 + 6x = -45 Add '87' to each side of the equation. -87 + 87 + 6x = -45 + 87 Combine like terms: -87 + 87 = 0 0 + 6x = -45 + 87 6x = -45 + 87 Combine like terms: -45 + 87 = 42 6x = 42 Divide each side by '6'. x = 7 Simplifying x = 7
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