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Simplifying 3(5x + -7) + -1a(2x + 5) = 0 Reorder the terms: 3(-7 + 5x) + -1a(2x + 5) = 0 (-7 * 3 + 5x * 3) + -1a(2x + 5) = 0 (-21 + 15x) + -1a(2x + 5) = 0 Reorder the terms: -21 + 15x + -1a(5 + 2x) = 0 -21 + 15x + (5 * -1a + 2x * -1a) = 0 -21 + 15x + (-5a + -2ax) = 0 Reorder the terms: -21 + -5a + -2ax + 15x = 0 Solving -21 + -5a + -2ax + 15x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -5a + -2ax + 21 + 15x = 0 + 21 Reorder the terms: -21 + 21 + -5a + -2ax + 15x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -5a + -2ax + 15x = 0 + 21 -5a + -2ax + 15x = 0 + 21 Combine like terms: 0 + 21 = 21 -5a + -2ax + 15x = 21 Add '-15x' to each side of the equation. -5a + -2ax + 15x + -15x = 21 + -15x Combine like terms: 15x + -15x = 0 -5a + -2ax + 0 = 21 + -15x -5a + -2ax = 21 + -15x Reorder the terms: -21 + -5a + -2ax + 15x = 21 + -15x + -21 + 15x Reorder the terms: -21 + -5a + -2ax + 15x = 21 + -21 + -15x + 15x Combine like terms: 21 + -21 = 0 -21 + -5a + -2ax + 15x = 0 + -15x + 15x -21 + -5a + -2ax + 15x = -15x + 15x Combine like terms: -15x + 15x = 0 -21 + -5a + -2ax + 15x = 0 The solution to this equation could not be determined.
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