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Simplifying 8x + -10(3 + -1x) = 42 8x + (3 * -10 + -1x * -10) = 42 8x + (-30 + 10x) = 42 Reorder the terms: -30 + 8x + 10x = 42 Combine like terms: 8x + 10x = 18x -30 + 18x = 42 Solving -30 + 18x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 18x = 42 + 30 Combine like terms: -30 + 30 = 0 0 + 18x = 42 + 30 18x = 42 + 30 Combine like terms: 42 + 30 = 72 18x = 72 Divide each side by '18'. x = 4 Simplifying x = 4
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