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Simplifying 7(2x + -5) + 20 = 139 Reorder the terms: 7(-5 + 2x) + 20 = 139 (-5 * 7 + 2x * 7) + 20 = 139 (-35 + 14x) + 20 = 139 Reorder the terms: -35 + 20 + 14x = 139 Combine like terms: -35 + 20 = -15 -15 + 14x = 139 Solving -15 + 14x = 139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 14x = 139 + 15 Combine like terms: -15 + 15 = 0 0 + 14x = 139 + 15 14x = 139 + 15 Combine like terms: 139 + 15 = 154 14x = 154 Divide each side by '14'. x = 11 Simplifying x = 11
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