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Simplifying 0.63 * 0.63 + 0.63 * 0.63 * 0.37 + 0.63 * 0.63 * 0.63 = x Multiply 0.63 * 0.63 0.3969 + 0.63 * 0.63 * 0.37 + 0.63 * 0.63 * 0.63 = x Multiply 0.63 * 0.63 0.3969 + 0.3969 * 0.37 + 0.63 * 0.63 * 0.63 = x Multiply 0.3969 * 0.37 0.3969 + 0.146853 + 0.63 * 0.63 * 0.63 = x Multiply 0.63 * 0.63 0.3969 + 0.146853 + 0.3969 * 0.63 = x Multiply 0.3969 * 0.63 0.3969 + 0.146853 + 0.250047 = x Combine like terms: 0.3969 + 0.146853 = 0.543753 0.543753 + 0.250047 = x Combine like terms: 0.543753 + 0.250047 = 0.7938 0.7938 = x Solving 0.7938 = x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 0.7938 + -1x = x + -1x Combine like terms: x + -1x = 0 0.7938 + -1x = 0 Add '-0.7938' to each side of the equation. 0.7938 + -0.7938 + -1x = 0 + -0.7938 Combine like terms: 0.7938 + -0.7938 = 0.0000 0.0000 + -1x = 0 + -0.7938 -1x = 0 + -0.7938 Combine like terms: 0 + -0.7938 = -0.7938 -1x = -0.7938 Divide each side by '-1'. x = 0.7938 Simplifying x = 0.7938
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