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Simplifying 84 = 30 + x Solving 84 = 30 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 84 + -1x = 30 + x + -1x Combine like terms: x + -1x = 0 84 + -1x = 30 + 0 84 + -1x = 30 Add '-84' to each side of the equation. 84 + -84 + -1x = 30 + -84 Combine like terms: 84 + -84 = 0 0 + -1x = 30 + -84 -1x = 30 + -84 Combine like terms: 30 + -84 = -54 -1x = -54 Divide each side by '-1'. x = 54 Simplifying x = 54
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