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Simplifying 11z2 + 5r + -9 = 0 Reorder the terms: -9 + 5r + 11z2 = 0 Solving -9 + 5r + 11z2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 5r + 9 + 11z2 = 0 + 9 Reorder the terms: -9 + 9 + 5r + 11z2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 5r + 11z2 = 0 + 9 5r + 11z2 = 0 + 9 Combine like terms: 0 + 9 = 9 5r + 11z2 = 9 Add '-11z2' to each side of the equation. 5r + 11z2 + -11z2 = 9 + -11z2 Combine like terms: 11z2 + -11z2 = 0 5r + 0 = 9 + -11z2 5r = 9 + -11z2 Divide each side by '5'. r = 1.8 + -2.2z2 Simplifying r = 1.8 + -2.2z2
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