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Simplifying 7x + -126 = 45 + -2x Reorder the terms: -126 + 7x = 45 + -2x Solving -126 + 7x = 45 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -126 + 7x + 2x = 45 + -2x + 2x Combine like terms: 7x + 2x = 9x -126 + 9x = 45 + -2x + 2x Combine like terms: -2x + 2x = 0 -126 + 9x = 45 + 0 -126 + 9x = 45 Add '126' to each side of the equation. -126 + 126 + 9x = 45 + 126 Combine like terms: -126 + 126 = 0 0 + 9x = 45 + 126 9x = 45 + 126 Combine like terms: 45 + 126 = 171 9x = 171 Divide each side by '9'. x = 19 Simplifying x = 19
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