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Simplifying 7x + 21y + 49 = 0 Reorder the terms: 49 + 7x + 21y = 0 Solving 49 + 7x + 21y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + 7x + -49 + 21y = 0 + -49 Reorder the terms: 49 + -49 + 7x + 21y = 0 + -49 Combine like terms: 49 + -49 = 0 0 + 7x + 21y = 0 + -49 7x + 21y = 0 + -49 Combine like terms: 0 + -49 = -49 7x + 21y = -49 Add '-21y' to each side of the equation. 7x + 21y + -21y = -49 + -21y Combine like terms: 21y + -21y = 0 7x + 0 = -49 + -21y 7x = -49 + -21y Divide each side by '7'. x = -7 + -3y Simplifying x = -7 + -3y
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