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Simplifying 7x + -42 = x Reorder the terms: -42 + 7x = x Solving -42 + 7x = 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. -42 + 7x + -1x = x + -1x Combine like terms: 7x + -1x = 6x -42 + 6x = x + -1x Combine like terms: x + -1x = 0 -42 + 6x = 0 Add '42' to each side of the equation. -42 + 42 + 6x = 0 + 42 Combine like terms: -42 + 42 = 0 0 + 6x = 0 + 42 6x = 0 + 42 Combine like terms: 0 + 42 = 42 6x = 42 Divide each side by '6'. x = 7 Simplifying x = 7
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