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Simplifying X + 3x + 4(x + -1) = -12 Reorder the terms: X + 3x + 4(-1 + x) = -12 X + 3x + (-1 * 4 + x * 4) = -12 X + 3x + (-4 + 4x) = -12 Reorder the terms: -4 + X + 3x + 4x = -12 Combine like terms: 3x + 4x = 7x -4 + X + 7x = -12 Solving -4 + X + 7x = -12 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '4' to each side of the equation. -4 + X + 4 + 7x = -12 + 4 Reorder the terms: -4 + 4 + X + 7x = -12 + 4 Combine like terms: -4 + 4 = 0 0 + X + 7x = -12 + 4 X + 7x = -12 + 4 Combine like terms: -12 + 4 = -8 X + 7x = -8 Add '-7x' to each side of the equation. X + 7x + -7x = -8 + -7x Combine like terms: 7x + -7x = 0 X + 0 = -8 + -7x X = -8 + -7x Simplifying X = -8 + -7x
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