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Simplifying 7x + 7 + -1x + 7 + -2x + -8 = 42 Reorder the terms: 7 + 7 + -8 + 7x + -1x + -2x = 42 Combine like terms: 7 + 7 = 14 14 + -8 + 7x + -1x + -2x = 42 Combine like terms: 14 + -8 = 6 6 + 7x + -1x + -2x = 42 Combine like terms: 7x + -1x = 6x 6 + 6x + -2x = 42 Combine like terms: 6x + -2x = 4x 6 + 4x = 42 Solving 6 + 4x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 4x = 42 + -6 Combine like terms: 6 + -6 = 0 0 + 4x = 42 + -6 4x = 42 + -6 Combine like terms: 42 + -6 = 36 4x = 36 Divide each side by '4'. x = 9 Simplifying x = 9
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