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Simplifying (2x + 1) + -1(7x + 3) = 0 Reorder the terms: (1 + 2x) + -1(7x + 3) = 0 Remove parenthesis around (1 + 2x) 1 + 2x + -1(7x + 3) = 0 Reorder the terms: 1 + 2x + -1(3 + 7x) = 0 1 + 2x + (3 * -1 + 7x * -1) = 0 1 + 2x + (-3 + -7x) = 0 Reorder the terms: 1 + -3 + 2x + -7x = 0 Combine like terms: 1 + -3 = -2 -2 + 2x + -7x = 0 Combine like terms: 2x + -7x = -5x -2 + -5x = 0 Solving -2 + -5x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -5x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5x = 0 + 2 -5x = 0 + 2 Combine like terms: 0 + 2 = 2 -5x = 2 Divide each side by '-5'. x = -0.4 Simplifying x = -0.4
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