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Simplifying x + -7(x + -3) = -4 Reorder the terms: x + -7(-3 + x) = -4 x + (-3 * -7 + x * -7) = -4 x + (21 + -7x) = -4 Reorder the terms: 21 + x + -7x = -4 Combine like terms: x + -7x = -6x 21 + -6x = -4 Solving 21 + -6x = -4 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 + -6x = -4 + -21 Combine like terms: 21 + -21 = 0 0 + -6x = -4 + -21 -6x = -4 + -21 Combine like terms: -4 + -21 = -25 -6x = -25 Divide each side by '-6'. x = 4.166666667 Simplifying x = 4.166666667
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