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Simplifying 7(4 + r) = 7(5 + r) (4 * 7 + r * 7) = 7(5 + r) (28 + 7r) = 7(5 + r) 28 + 7r = (5 * 7 + r * 7) 28 + 7r = (35 + 7r) Add '-7r' to each side of the equation. 28 + 7r + -7r = 35 + 7r + -7r Combine like terms: 7r + -7r = 0 28 + 0 = 35 + 7r + -7r 28 = 35 + 7r + -7r Combine like terms: 7r + -7r = 0 28 = 35 + 0 28 = 35 Solving 28 = 35 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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