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Simplifying 4x + 7(5x + -12) = 189 Reorder the terms: 4x + 7(-12 + 5x) = 189 4x + (-12 * 7 + 5x * 7) = 189 4x + (-84 + 35x) = 189 Reorder the terms: -84 + 4x + 35x = 189 Combine like terms: 4x + 35x = 39x -84 + 39x = 189 Solving -84 + 39x = 189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '84' to each side of the equation. -84 + 84 + 39x = 189 + 84 Combine like terms: -84 + 84 = 0 0 + 39x = 189 + 84 39x = 189 + 84 Combine like terms: 189 + 84 = 273 39x = 273 Divide each side by '39'. x = 7 Simplifying x = 7
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