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Simplifying 7(x + -3) + -9 = 4x + 3(4 + x) Reorder the terms: 7(-3 + x) + -9 = 4x + 3(4 + x) (-3 * 7 + x * 7) + -9 = 4x + 3(4 + x) (-21 + 7x) + -9 = 4x + 3(4 + x) Reorder the terms: -21 + -9 + 7x = 4x + 3(4 + x) Combine like terms: -21 + -9 = -30 -30 + 7x = 4x + 3(4 + x) -30 + 7x = 4x + (4 * 3 + x * 3) -30 + 7x = 4x + (12 + 3x) Reorder the terms: -30 + 7x = 12 + 4x + 3x Combine like terms: 4x + 3x = 7x -30 + 7x = 12 + 7x Add '-7x' to each side of the equation. -30 + 7x + -7x = 12 + 7x + -7x Combine like terms: 7x + -7x = 0 -30 + 0 = 12 + 7x + -7x -30 = 12 + 7x + -7x Combine like terms: 7x + -7x = 0 -30 = 12 + 0 -30 = 12 Solving -30 = 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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