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Simplifying 7(x + 7) + 81 = 9x + -2(x + -2) Reorder the terms: 7(7 + x) + 81 = 9x + -2(x + -2) (7 * 7 + x * 7) + 81 = 9x + -2(x + -2) (49 + 7x) + 81 = 9x + -2(x + -2) Reorder the terms: 49 + 81 + 7x = 9x + -2(x + -2) Combine like terms: 49 + 81 = 130 130 + 7x = 9x + -2(x + -2) Reorder the terms: 130 + 7x = 9x + -2(-2 + x) 130 + 7x = 9x + (-2 * -2 + x * -2) 130 + 7x = 9x + (4 + -2x) Reorder the terms: 130 + 7x = 4 + 9x + -2x Combine like terms: 9x + -2x = 7x 130 + 7x = 4 + 7x Add '-7x' to each side of the equation. 130 + 7x + -7x = 4 + 7x + -7x Combine like terms: 7x + -7x = 0 130 + 0 = 4 + 7x + -7x 130 = 4 + 7x + -7x Combine like terms: 7x + -7x = 0 130 = 4 + 0 130 = 4 Solving 130 = 4 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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