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Simplifying 21 + -1X + -1Y + 5Y + 20(1X + 9) = 351 Reorder the terms: 21 + -1X + -1Y + 5Y + 20(9 + 1X) = 351 21 + -1X + -1Y + 5Y + (9 * 20 + 1X * 20) = 351 21 + -1X + -1Y + 5Y + (180 + 20X) = 351 Reorder the terms: 21 + 180 + -1X + 20X + -1Y + 5Y = 351 Combine like terms: 21 + 180 = 201 201 + -1X + 20X + -1Y + 5Y = 351 Combine like terms: -1X + 20X = 19X 201 + 19X + -1Y + 5Y = 351 Combine like terms: -1Y + 5Y = 4Y 201 + 19X + 4Y = 351 Solving 201 + 19X + 4Y = 351 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-201' to each side of the equation. 201 + 19X + -201 + 4Y = 351 + -201 Reorder the terms: 201 + -201 + 19X + 4Y = 351 + -201 Combine like terms: 201 + -201 = 0 0 + 19X + 4Y = 351 + -201 19X + 4Y = 351 + -201 Combine like terms: 351 + -201 = 150 19X + 4Y = 150 Add '-4Y' to each side of the equation. 19X + 4Y + -4Y = 150 + -4Y Combine like terms: 4Y + -4Y = 0 19X + 0 = 150 + -4Y 19X = 150 + -4Y Divide each side by '19'. X = 7.894736842 + -0.2105263158Y Simplifying X = 7.894736842 + -0.2105263158Y
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