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Simplifying 126 = -2x + 4(4x + 7) Reorder the terms: 126 = -2x + 4(7 + 4x) 126 = -2x + (7 * 4 + 4x * 4) 126 = -2x + (28 + 16x) Reorder the terms: 126 = 28 + -2x + 16x Combine like terms: -2x + 16x = 14x 126 = 28 + 14x Solving 126 = 28 + 14x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14x' to each side of the equation. 126 + -14x = 28 + 14x + -14x Combine like terms: 14x + -14x = 0 126 + -14x = 28 + 0 126 + -14x = 28 Add '-126' to each side of the equation. 126 + -126 + -14x = 28 + -126 Combine like terms: 126 + -126 = 0 0 + -14x = 28 + -126 -14x = 28 + -126 Combine like terms: 28 + -126 = -98 -14x = -98 Divide each side by '-14'. x = 7 Simplifying x = 7
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