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Simplifying 3a(7) = 42 Reorder the terms for easier multiplication: 3 * 7a = 42 Multiply 3 * 7 21a = 42 Solving 21a = 42 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Divide each side by '21'. a = 2 Simplifying a = 2
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