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Simplifying (X + -3) + -1(x + -7) = 7x Reorder the terms: (-3 + X) + -1(x + -7) = 7x Remove parenthesis around (-3 + X) -3 + X + -1(x + -7) = 7x Reorder the terms: -3 + X + -1(-7 + x) = 7x -3 + X + (-7 * -1 + x * -1) = 7x -3 + X + (7 + -1x) = 7x Reorder the terms: -3 + 7 + X + -1x = 7x Combine like terms: -3 + 7 = 4 4 + X + -1x = 7x Solving 4 + X + -1x = 7x 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 + -1x = -4 + 7x Reorder the terms: 4 + -4 + X + -1x = -4 + 7x Combine like terms: 4 + -4 = 0 0 + X + -1x = -4 + 7x X + -1x = -4 + 7x Add 'x' to each side of the equation. X + -1x + x = -4 + 7x + x Combine like terms: -1x + x = 0 X + 0 = -4 + 7x + x X = -4 + 7x + x Combine like terms: 7x + x = 8x X = -4 + 8x Simplifying X = -4 + 8x
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