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Simplifying 7(7x + 3) = 21 + 2x Reorder the terms: 7(3 + 7x) = 21 + 2x (3 * 7 + 7x * 7) = 21 + 2x (21 + 49x) = 21 + 2x Add '-21' to each side of the equation. 21 + -21 + 49x = 21 + -21 + 2x Combine like terms: 21 + -21 = 0 0 + 49x = 21 + -21 + 2x 49x = 21 + -21 + 2x Combine like terms: 21 + -21 = 0 49x = 0 + 2x 49x = 2x Solving 49x = 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 49x + -2x = 2x + -2x Combine like terms: 49x + -2x = 47x 47x = 2x + -2x Combine like terms: 2x + -2x = 0 47x = 0 Divide each side by '47'. x = 0 Simplifying x = 0
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