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Simplifying 21x + -28y + 7 = 0 Reorder the terms: 7 + 21x + -28y = 0 Solving 7 + 21x + -28y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 21x + -7 + -28y = 0 + -7 Reorder the terms: 7 + -7 + 21x + -28y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 21x + -28y = 0 + -7 21x + -28y = 0 + -7 Combine like terms: 0 + -7 = -7 21x + -28y = -7 Add '28y' to each side of the equation. 21x + -28y + 28y = -7 + 28y Combine like terms: -28y + 28y = 0 21x + 0 = -7 + 28y 21x = -7 + 28y Divide each side by '21'. x = -0.3333333333 + 1.333333333y Simplifying x = -0.3333333333 + 1.333333333y
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