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Simplifying 2 + -5[x + 3(x + 7)] = 0 Reorder the terms: 2 + -5[x + 3(7 + x)] = 0 2 + -5[x + (7 * 3 + x * 3)] = 0 2 + -5[x + (21 + 3x)] = 0 Reorder the terms: 2 + -5[21 + x + 3x] = 0 Combine like terms: x + 3x = 4x 2 + -5[21 + 4x] = 0 2 + [21 * -5 + 4x * -5] = 0 2 + [-105 + -20x] = 0 Combine like terms: 2 + -105 = -103 -103 + -20x = 0 Solving -103 + -20x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '103' to each side of the equation. -103 + 103 + -20x = 0 + 103 Combine like terms: -103 + 103 = 0 0 + -20x = 0 + 103 -20x = 0 + 103 Combine like terms: 0 + 103 = 103 -20x = 103 Divide each side by '-20'. x = -5.15 Simplifying x = -5.15
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