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Simplifying (9x + -5) + -1(7x + 4) = 0 Reorder the terms: (-5 + 9x) + -1(7x + 4) = 0 Remove parenthesis around (-5 + 9x) -5 + 9x + -1(7x + 4) = 0 Reorder the terms: -5 + 9x + -1(4 + 7x) = 0 -5 + 9x + (4 * -1 + 7x * -1) = 0 -5 + 9x + (-4 + -7x) = 0 Reorder the terms: -5 + -4 + 9x + -7x = 0 Combine like terms: -5 + -4 = -9 -9 + 9x + -7x = 0 Combine like terms: 9x + -7x = 2x -9 + 2x = 0 Solving -9 + 2x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2x = 0 + 9 2x = 0 + 9 Combine like terms: 0 + 9 = 9 2x = 9 Divide each side by '2'. x = 4.5 Simplifying x = 4.5
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