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Simplifying 10x + 30x + -9 = 10(4x + 10) Reorder the terms: -9 + 10x + 30x = 10(4x + 10) Combine like terms: 10x + 30x = 40x -9 + 40x = 10(4x + 10) Reorder the terms: -9 + 40x = 10(10 + 4x) -9 + 40x = (10 * 10 + 4x * 10) -9 + 40x = (100 + 40x) Add '-40x' to each side of the equation. -9 + 40x + -40x = 100 + 40x + -40x Combine like terms: 40x + -40x = 0 -9 + 0 = 100 + 40x + -40x -9 = 100 + 40x + -40x Combine like terms: 40x + -40x = 0 -9 = 100 + 0 -9 = 100 Solving -9 = 100 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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