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Simplifying X + -7 = 3(x + 7) Reorder the terms: -7 + X = 3(x + 7) Reorder the terms: -7 + X = 3(7 + x) -7 + X = (7 * 3 + x * 3) -7 + X = (21 + 3x) Solving -7 + X = 21 + 3x 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 + X = 21 + 7 + 3x Combine like terms: -7 + 7 = 0 0 + X = 21 + 7 + 3x X = 21 + 7 + 3x Combine like terms: 21 + 7 = 28 X = 28 + 3x Simplifying X = 28 + 3x
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