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Simplifying 2x + -5(x + 4) = 8 + -7 Reorder the terms: 2x + -5(4 + x) = 8 + -7 2x + (4 * -5 + x * -5) = 8 + -7 2x + (-20 + -5x) = 8 + -7 Reorder the terms: -20 + 2x + -5x = 8 + -7 Combine like terms: 2x + -5x = -3x -20 + -3x = 8 + -7 Combine like terms: 8 + -7 = 1 -20 + -3x = 1 Solving -20 + -3x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -3x = 1 + 20 Combine like terms: -20 + 20 = 0 0 + -3x = 1 + 20 -3x = 1 + 20 Combine like terms: 1 + 20 = 21 -3x = 21 Divide each side by '-3'. x = -7 Simplifying x = -7
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