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Simplifying 4(x + 9) + 9 = 7x + -3(x + -4) Reorder the terms: 4(9 + x) + 9 = 7x + -3(x + -4) (9 * 4 + x * 4) + 9 = 7x + -3(x + -4) (36 + 4x) + 9 = 7x + -3(x + -4) Reorder the terms: 36 + 9 + 4x = 7x + -3(x + -4) Combine like terms: 36 + 9 = 45 45 + 4x = 7x + -3(x + -4) Reorder the terms: 45 + 4x = 7x + -3(-4 + x) 45 + 4x = 7x + (-4 * -3 + x * -3) 45 + 4x = 7x + (12 + -3x) Reorder the terms: 45 + 4x = 12 + 7x + -3x Combine like terms: 7x + -3x = 4x 45 + 4x = 12 + 4x Add '-4x' to each side of the equation. 45 + 4x + -4x = 12 + 4x + -4x Combine like terms: 4x + -4x = 0 45 + 0 = 12 + 4x + -4x 45 = 12 + 4x + -4x Combine like terms: 4x + -4x = 0 45 = 12 + 0 45 = 12 Solving 45 = 12 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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