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Simplifying 7(x + 3) + -7 = 3x + 4(3 + x) Reorder the terms: 7(3 + x) + -7 = 3x + 4(3 + x) (3 * 7 + x * 7) + -7 = 3x + 4(3 + x) (21 + 7x) + -7 = 3x + 4(3 + x) Reorder the terms: 21 + -7 + 7x = 3x + 4(3 + x) Combine like terms: 21 + -7 = 14 14 + 7x = 3x + 4(3 + x) 14 + 7x = 3x + (3 * 4 + x * 4) 14 + 7x = 3x + (12 + 4x) Reorder the terms: 14 + 7x = 12 + 3x + 4x Combine like terms: 3x + 4x = 7x 14 + 7x = 12 + 7x Add '-7x' to each side of the equation. 14 + 7x + -7x = 12 + 7x + -7x Combine like terms: 7x + -7x = 0 14 + 0 = 12 + 7x + -7x 14 = 12 + 7x + -7x Combine like terms: 7x + -7x = 0 14 = 12 + 0 14 = 12 Solving 14 = 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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