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Simplifying (4 + -7x) + -1(7 + x) = 0 Remove parenthesis around (4 + -7x) 4 + -7x + -1(7 + x) = 0 4 + -7x + (7 * -1 + x * -1) = 0 4 + -7x + (-7 + -1x) = 0 Reorder the terms: 4 + -7 + -7x + -1x = 0 Combine like terms: 4 + -7 = -3 -3 + -7x + -1x = 0 Combine like terms: -7x + -1x = -8x -3 + -8x = 0 Solving -3 + -8x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -8x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -8x = 0 + 3 -8x = 0 + 3 Combine like terms: 0 + 3 = 3 -8x = 3 Divide each side by '-8'. x = -0.375 Simplifying x = -0.375
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