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Simplifying -4x + -7(-1x + 3) = -3 Reorder the terms: -4x + -7(3 + -1x) = -3 -4x + (3 * -7 + -1x * -7) = -3 -4x + (-21 + 7x) = -3 Reorder the terms: -21 + -4x + 7x = -3 Combine like terms: -4x + 7x = 3x -21 + 3x = -3 Solving -21 + 3x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 3x = -3 + 21 Combine like terms: -21 + 21 = 0 0 + 3x = -3 + 21 3x = -3 + 21 Combine like terms: -3 + 21 = 18 3x = 18 Divide each side by '3'. x = 6 Simplifying x = 6
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