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Simplifying Zsquared + -10z + 21 = 0 Reorder the terms: 21 + adeqrsuZ + -10z = 0 Solving 21 + adeqrsuZ + -10z = 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 + adeqrsuZ + -21 + -10z = 0 + -21 Reorder the terms: 21 + -21 + adeqrsuZ + -10z = 0 + -21 Combine like terms: 21 + -21 = 0 0 + adeqrsuZ + -10z = 0 + -21 adeqrsuZ + -10z = 0 + -21 Combine like terms: 0 + -21 = -21 adeqrsuZ + -10z = -21 Add '10z' to each side of the equation. adeqrsuZ + -10z + 10z = -21 + 10z Combine like terms: -10z + 10z = 0 adeqrsuZ + 0 = -21 + 10z adeqrsuZ = -21 + 10z Divide each side by 'deqrsuZ'. a = -21d-1e-1q-1r-1s-1u-1Z-1 + 10d-1e-1q-1r-1s-1u-1zZ-1 Simplifying a = -21d-1e-1q-1r-1s-1u-1Z-1 + 10d-1e-1q-1r-1s-1u-1zZ-1
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