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Simplifying 7x + -4x + 20 = 3(x + 3) Reorder the terms: 20 + 7x + -4x = 3(x + 3) Combine like terms: 7x + -4x = 3x 20 + 3x = 3(x + 3) Reorder the terms: 20 + 3x = 3(3 + x) 20 + 3x = (3 * 3 + x * 3) 20 + 3x = (9 + 3x) Add '-3x' to each side of the equation. 20 + 3x + -3x = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 20 + 0 = 9 + 3x + -3x 20 = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 20 = 9 + 0 20 = 9 Solving 20 = 9 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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