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Simplifying x + -4(x + 1) = 4x + -15 Reorder the terms: x + -4(1 + x) = 4x + -15 x + (1 * -4 + x * -4) = 4x + -15 x + (-4 + -4x) = 4x + -15 Reorder the terms: -4 + x + -4x = 4x + -15 Combine like terms: x + -4x = -3x -4 + -3x = 4x + -15 Reorder the terms: -4 + -3x = -15 + 4x Solving -4 + -3x = -15 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. -4 + -3x + -4x = -15 + 4x + -4x Combine like terms: -3x + -4x = -7x -4 + -7x = -15 + 4x + -4x Combine like terms: 4x + -4x = 0 -4 + -7x = -15 + 0 -4 + -7x = -15 Add '4' to each side of the equation. -4 + 4 + -7x = -15 + 4 Combine like terms: -4 + 4 = 0 0 + -7x = -15 + 4 -7x = -15 + 4 Combine like terms: -15 + 4 = -11 -7x = -11 Divide each side by '-7'. x = 1.571428571 Simplifying x = 1.571428571
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