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Simplifying 3 + 0.5(3 + -1x) = -7 3 + (3 * 0.5 + -1x * 0.5) = -7 3 + (1.5 + -0.5x) = -7 Combine like terms: 3 + 1.5 = 4.5 4.5 + -0.5x = -7 Solving 4.5 + -0.5x = -7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + -0.5x = -7 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + -0.5x = -7 + -4.5 -0.5x = -7 + -4.5 Combine like terms: -7 + -4.5 = -11.5 -0.5x = -11.5 Divide each side by '-0.5'. x = 23 Simplifying x = 23
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