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Simplifying 9 + -1x = 7x + 42 Reorder the terms: 9 + -1x = 42 + 7x Solving 9 + -1x = 42 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 9 + -1x + -7x = 42 + 7x + -7x Combine like terms: -1x + -7x = -8x 9 + -8x = 42 + 7x + -7x Combine like terms: 7x + -7x = 0 9 + -8x = 42 + 0 9 + -8x = 42 Add '-9' to each side of the equation. 9 + -9 + -8x = 42 + -9 Combine like terms: 9 + -9 = 0 0 + -8x = 42 + -9 -8x = 42 + -9 Combine like terms: 42 + -9 = 33 -8x = 33 Divide each side by '-8'. x = -4.125 Simplifying x = -4.125
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