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Simplifying 7 * 3x + (7) = 70 Multiply 7 * 3 21x + (7) = 70 21x + 7 = 70 Reorder the terms: 7 + 21x = 70 Solving 7 + 21x = 70 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 21x = 70 + -7 Combine like terms: 7 + -7 = 0 0 + 21x = 70 + -7 21x = 70 + -7 Combine like terms: 70 + -7 = 63 21x = 63 Divide each side by '21'. x = 3 Simplifying x = 3
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