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Simplifying 3x + 87 = 7x + 31 Reorder the terms: 87 + 3x = 7x + 31 Reorder the terms: 87 + 3x = 31 + 7x Solving 87 + 3x = 31 + 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 + 3x + -7x = 31 + 7x + -7x Combine like terms: 3x + -7x = -4x 87 + -4x = 31 + 7x + -7x Combine like terms: 7x + -7x = 0 87 + -4x = 31 + 0 87 + -4x = 31 Add '-87' to each side of the equation. 87 + -87 + -4x = 31 + -87 Combine like terms: 87 + -87 = 0 0 + -4x = 31 + -87 -4x = 31 + -87 Combine like terms: 31 + -87 = -56 -4x = -56 Divide each side by '-4'. x = 14 Simplifying x = 14
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