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Simplifying 21 + -8(y + 2) + 3 + 7x = 0 Reorder the terms: 21 + -8(2 + y) + 3 + 7x = 0 21 + (2 * -8 + y * -8) + 3 + 7x = 0 21 + (-16 + -8y) + 3 + 7x = 0 Reorder the terms: 21 + -16 + 3 + 7x + -8y = 0 Combine like terms: 21 + -16 = 5 5 + 3 + 7x + -8y = 0 Combine like terms: 5 + 3 = 8 8 + 7x + -8y = 0 Solving 8 + 7x + -8y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + 7x + -8 + -8y = 0 + -8 Reorder the terms: 8 + -8 + 7x + -8y = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 7x + -8y = 0 + -8 7x + -8y = 0 + -8 Combine like terms: 0 + -8 = -8 7x + -8y = -8 Add '8y' to each side of the equation. 7x + -8y + 8y = -8 + 8y Combine like terms: -8y + 8y = 0 7x + 0 = -8 + 8y 7x = -8 + 8y Divide each side by '7'. x = -1.142857143 + 1.142857143y Simplifying x = -1.142857143 + 1.142857143y
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