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Simplifying -3a(42 + 4x) + -2(5a + -4z) = -7ax (42 * -3a + 4x * -3a) + -2(5a + -4z) = -7ax (-126a + -12ax) + -2(5a + -4z) = -7ax -126a + -12ax + (5a * -2 + -4z * -2) = -7ax -126a + -12ax + (-10a + 8z) = -7ax Reorder the terms: -126a + -10a + -12ax + 8z = -7ax Combine like terms: -126a + -10a = -136a -136a + -12ax + 8z = -7ax Solving -136a + -12ax + 8z = -7ax Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7ax' to each side of the equation. -136a + -12ax + 7ax + 8z = -7ax + 7ax Combine like terms: -12ax + 7ax = -5ax -136a + -5ax + 8z = -7ax + 7ax Combine like terms: -7ax + 7ax = 0 -136a + -5ax + 8z = 0 Add '-8z' to each side of the equation. -136a + -5ax + 8z + -8z = 0 + -8z Combine like terms: 8z + -8z = 0 -136a + -5ax + 0 = 0 + -8z -136a + -5ax = 0 + -8z Remove the zero: -136a + -5ax = -8z Combine like terms: -8z + 8z = 0 -136a + -5ax + 8z = 0 The solution to this equation could not be determined.
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