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Simplifying x + -1 + -1(2x + 3) = 7 Reorder the terms: x + -1 + -1(3 + 2x) = 7 x + -1 + (3 * -1 + 2x * -1) = 7 x + -1 + (-3 + -2x) = 7 Reorder the terms: -1 + -3 + x + -2x = 7 Combine like terms: -1 + -3 = -4 -4 + x + -2x = 7 Combine like terms: x + -2x = -1x -4 + -1x = 7 Solving -4 + -1x = 7 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 + 4 + -1x = 7 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 7 + 4 -1x = 7 + 4 Combine like terms: 7 + 4 = 11 -1x = 11 Divide each side by '-1'. x = -11 Simplifying x = -11
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