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Simplifying 3x * 7 + 7 * 5 = 12 Reorder the terms for easier multiplication: 3 * 7x + 7 * 5 = 12 Multiply 3 * 7 21x + 7 * 5 = 12 Multiply 7 * 5 21x + 35 = 12 Reorder the terms: 35 + 21x = 12 Solving 35 + 21x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + 21x = 12 + -35 Combine like terms: 35 + -35 = 0 0 + 21x = 12 + -35 21x = 12 + -35 Combine like terms: 12 + -35 = -23 21x = -23 Divide each side by '21'. x = -1.095238095 Simplifying x = -1.095238095
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