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Simplifying 0.9(x + 70) + 0.5x = 12 Reorder the terms: 0.9(70 + x) + 0.5x = 12 (70 * 0.9 + x * 0.9) + 0.5x = 12 (63 + 0.9x) + 0.5x = 12 Combine like terms: 0.9x + 0.5x = 1.4x 63 + 1.4x = 12 Solving 63 + 1.4x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + -63 + 1.4x = 12 + -63 Combine like terms: 63 + -63 = 0 0 + 1.4x = 12 + -63 1.4x = 12 + -63 Combine like terms: 12 + -63 = -51 1.4x = -51 Divide each side by '1.4'. x = -36.42857143 Simplifying x = -36.42857143
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