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Simplifying 30 = 78 + -3x Solving 30 = 78 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 30 + 3x = 78 + -3x + 3x Combine like terms: -3x + 3x = 0 30 + 3x = 78 + 0 30 + 3x = 78 Add '-30' to each side of the equation. 30 + -30 + 3x = 78 + -30 Combine like terms: 30 + -30 = 0 0 + 3x = 78 + -30 3x = 78 + -30 Combine like terms: 78 + -30 = 48 3x = 48 Divide each side by '3'. x = 16 Simplifying x = 16
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