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Simplifying 7x + -1(2a + 4) = 0 Reorder the terms: 7x + -1(4 + 2a) = 0 7x + (4 * -1 + 2a * -1) = 0 7x + (-4 + -2a) = 0 Reorder the terms: -4 + -2a + 7x = 0 Solving -4 + -2a + 7x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + -2a + 4 + 7x = 0 + 4 Reorder the terms: -4 + 4 + -2a + 7x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -2a + 7x = 0 + 4 -2a + 7x = 0 + 4 Combine like terms: 0 + 4 = 4 -2a + 7x = 4 Add '-7x' to each side of the equation. -2a + 7x + -7x = 4 + -7x Combine like terms: 7x + -7x = 0 -2a + 0 = 4 + -7x -2a = 4 + -7x Divide each side by '-2'. a = -2 + 3.5x Simplifying a = -2 + 3.5x
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