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Simplifying 3(x + -5) = 21 + -2x Reorder the terms: 3(-5 + x) = 21 + -2x (-5 * 3 + x * 3) = 21 + -2x (-15 + 3x) = 21 + -2x Solving -15 + 3x = 21 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -15 + 3x + 2x = 21 + -2x + 2x Combine like terms: 3x + 2x = 5x -15 + 5x = 21 + -2x + 2x Combine like terms: -2x + 2x = 0 -15 + 5x = 21 + 0 -15 + 5x = 21 Add '15' to each side of the equation. -15 + 15 + 5x = 21 + 15 Combine like terms: -15 + 15 = 0 0 + 5x = 21 + 15 5x = 21 + 15 Combine like terms: 21 + 15 = 36 5x = 36 Divide each side by '5'. x = 7.2 Simplifying x = 7.2
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