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Simplifying (4x + 20) = (4x + -15) Reorder the terms: (20 + 4x) = (4x + -15) Remove parenthesis around (20 + 4x) 20 + 4x = (4x + -15) Reorder the terms: 20 + 4x = (-15 + 4x) Remove parenthesis around (-15 + 4x) 20 + 4x = -15 + 4x Add '-4x' to each side of the equation. 20 + 4x + -4x = -15 + 4x + -4x Combine like terms: 4x + -4x = 0 20 + 0 = -15 + 4x + -4x 20 = -15 + 4x + -4x Combine like terms: 4x + -4x = 0 20 = -15 + 0 20 = -15 Solving 20 = -15 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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