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Simplifying 7x + -15 = 5x + 2(x + -10) Reorder the terms: -15 + 7x = 5x + 2(x + -10) Reorder the terms: -15 + 7x = 5x + 2(-10 + x) -15 + 7x = 5x + (-10 * 2 + x * 2) -15 + 7x = 5x + (-20 + 2x) Reorder the terms: -15 + 7x = -20 + 5x + 2x Combine like terms: 5x + 2x = 7x -15 + 7x = -20 + 7x Add '-7x' to each side of the equation. -15 + 7x + -7x = -20 + 7x + -7x Combine like terms: 7x + -7x = 0 -15 + 0 = -20 + 7x + -7x -15 = -20 + 7x + -7x Combine like terms: 7x + -7x = 0 -15 = -20 + 0 -15 = -20 Solving -15 = -20 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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