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Simplifying 2x + 5 * 2 + -8 + 21a = 0 Multiply 5 * 2 2x + 10 + -8 + 21a = 0 Reorder the terms: 10 + -8 + 21a + 2x = 0 Combine like terms: 10 + -8 = 2 2 + 21a + 2x = 0 Solving 2 + 21a + 2x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + 21a + -2 + 2x = 0 + -2 Reorder the terms: 2 + -2 + 21a + 2x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 21a + 2x = 0 + -2 21a + 2x = 0 + -2 Combine like terms: 0 + -2 = -2 21a + 2x = -2 Add '-2x' to each side of the equation. 21a + 2x + -2x = -2 + -2x Combine like terms: 2x + -2x = 0 21a + 0 = -2 + -2x 21a = -2 + -2x Divide each side by '21'. a = -0.09523809524 + -0.09523809524x Simplifying a = -0.09523809524 + -0.09523809524x
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