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Simplifying 2x + -126 + -1(2x) = 9x + -1(2x) Remove parenthesis around (2x) 2x + -126 + -1 * 2x = 9x + -1(2x) Multiply -1 * 2 2x + -126 + -2x = 9x + -1(2x) Reorder the terms: -126 + 2x + -2x = 9x + -1(2x) Combine like terms: 2x + -2x = 0 -126 + 0 = 9x + -1(2x) -126 = 9x + -1(2x) Remove parenthesis around (2x) -126 = 9x + -1 * 2x Multiply -1 * 2 -126 = 9x + -2x Combine like terms: 9x + -2x = 7x -126 = 7x Solving -126 = 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. -126 + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 -126 + -7x = 0 Add '126' to each side of the equation. -126 + 126 + -7x = 0 + 126 Combine like terms: -126 + 126 = 0 0 + -7x = 0 + 126 -7x = 0 + 126 Combine like terms: 0 + 126 = 126 -7x = 126 Divide each side by '-7'. x = -18 Simplifying x = -18
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