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Simplifying a(-3)(-3) + 7(-3) + b = 0 Reorder the terms for easier multiplication: -3 * -3a + 7(-3) + b = 0 Multiply -3 * -3 9a + 7(-3) + b = 0 Multiply 7 * -3 9a + -21 + b = 0 Reorder the terms: -21 + 9a + b = 0 Solving -21 + 9a + b = 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 + 9a + 21 + b = 0 + 21 Reorder the terms: -21 + 21 + 9a + b = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 9a + b = 0 + 21 9a + b = 0 + 21 Combine like terms: 0 + 21 = 21 9a + b = 21 Add '-1b' to each side of the equation. 9a + b + -1b = 21 + -1b Combine like terms: b + -1b = 0 9a + 0 = 21 + -1b 9a = 21 + -1b Divide each side by '9'. a = 2.333333333 + -0.1111111111b Simplifying a = 2.333333333 + -0.1111111111b
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