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Simplifying 9x + 3x + -1(10) = 3(3x + x) Multiply -1 * 10 9x + 3x + -10 = 3(3x + x) Reorder the terms: -10 + 9x + 3x = 3(3x + x) Combine like terms: 9x + 3x = 12x -10 + 12x = 3(3x + x) Combine like terms: 3x + x = 4x -10 + 12x = 3(4x) Remove parenthesis around (4x) -10 + 12x = 3 * 4x Multiply 3 * 4 -10 + 12x = 12x Add '-12x' to each side of the equation. -10 + 12x + -12x = 12x + -12x Combine like terms: 12x + -12x = 0 -10 + 0 = 12x + -12x -10 = 12x + -12x Combine like terms: 12x + -12x = 0 -10 = 0 Solving -10 = 0 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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