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Simplifying 5X + -20 = 21 + -7X Reorder the terms: -20 + 5X = 21 + -7X Solving -20 + 5X = 21 + -7X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '7X' to each side of the equation. -20 + 5X + 7X = 21 + -7X + 7X Combine like terms: 5X + 7X = 12X -20 + 12X = 21 + -7X + 7X Combine like terms: -7X + 7X = 0 -20 + 12X = 21 + 0 -20 + 12X = 21 Add '20' to each side of the equation. -20 + 20 + 12X = 21 + 20 Combine like terms: -20 + 20 = 0 0 + 12X = 21 + 20 12X = 21 + 20 Combine like terms: 21 + 20 = 41 12X = 41 Divide each side by '12'. X = 3.416666667 Simplifying X = 3.416666667
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