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Simplifying 7 + 0.5(x + -3) = 21 Reorder the terms: 7 + 0.5(-3 + x) = 21 7 + (-3 * 0.5 + x * 0.5) = 21 7 + (-1.5 + 0.5x) = 21 Combine like terms: 7 + -1.5 = 5.5 5.5 + 0.5x = 21 Solving 5.5 + 0.5x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + 0.5x = 21 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + 0.5x = 21 + -5.5 0.5x = 21 + -5.5 Combine like terms: 21 + -5.5 = 15.5 0.5x = 15.5 Divide each side by '0.5'. x = 31 Simplifying x = 31
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