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Simplifying 15x + 6(x + -3) = 20 Reorder the terms: 15x + 6(-3 + x) = 20 15x + (-3 * 6 + x * 6) = 20 15x + (-18 + 6x) = 20 Reorder the terms: -18 + 15x + 6x = 20 Combine like terms: 15x + 6x = 21x -18 + 21x = 20 Solving -18 + 21x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 21x = 20 + 18 Combine like terms: -18 + 18 = 0 0 + 21x = 20 + 18 21x = 20 + 18 Combine like terms: 20 + 18 = 38 21x = 38 Divide each side by '21'. x = 1.80952381 Simplifying x = 1.80952381
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