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Simplifying 4a + 2(r + -4) = 0 Reorder the terms: 4a + 2(-4 + r) = 0 4a + (-4 * 2 + r * 2) = 0 4a + (-8 + 2r) = 0 Reorder the terms: -8 + 4a + 2r = 0 Solving -8 + 4a + 2r = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 4a + 8 + 2r = 0 + 8 Reorder the terms: -8 + 8 + 4a + 2r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + 4a + 2r = 0 + 8 4a + 2r = 0 + 8 Combine like terms: 0 + 8 = 8 4a + 2r = 8 Add '-2r' to each side of the equation. 4a + 2r + -2r = 8 + -2r Combine like terms: 2r + -2r = 0 4a + 0 = 8 + -2r 4a = 8 + -2r Divide each side by '4'. a = 2 + -0.5r Simplifying a = 2 + -0.5r
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