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Simplifying 7x + 7(-4x + -3) = -147 Reorder the terms: 7x + 7(-3 + -4x) = -147 7x + (-3 * 7 + -4x * 7) = -147 7x + (-21 + -28x) = -147 Reorder the terms: -21 + 7x + -28x = -147 Combine like terms: 7x + -28x = -21x -21 + -21x = -147 Solving -21 + -21x = -147 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 + -21x = -147 + 21 Combine like terms: -21 + 21 = 0 0 + -21x = -147 + 21 -21x = -147 + 21 Combine like terms: -147 + 21 = -126 -21x = -126 Divide each side by '-21'. x = 6 Simplifying x = 6
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