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Simplifying 4(x + 1) + 2(x + 3) = 6x + 15 Reorder the terms: 4(1 + x) + 2(x + 3) = 6x + 15 (1 * 4 + x * 4) + 2(x + 3) = 6x + 15 (4 + 4x) + 2(x + 3) = 6x + 15 Reorder the terms: 4 + 4x + 2(3 + x) = 6x + 15 4 + 4x + (3 * 2 + x * 2) = 6x + 15 4 + 4x + (6 + 2x) = 6x + 15 Reorder the terms: 4 + 6 + 4x + 2x = 6x + 15 Combine like terms: 4 + 6 = 10 10 + 4x + 2x = 6x + 15 Combine like terms: 4x + 2x = 6x 10 + 6x = 6x + 15 Reorder the terms: 10 + 6x = 15 + 6x Add '-6x' to each side of the equation. 10 + 6x + -6x = 15 + 6x + -6x Combine like terms: 6x + -6x = 0 10 + 0 = 15 + 6x + -6x 10 = 15 + 6x + -6x Combine like terms: 6x + -6x = 0 10 = 15 + 0 10 = 15 Solving 10 = 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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