5. Раскройте скобки: a) 3(4-2x); б) -4(5x+2); в) -2(5x-4); г) -(2x-5); д) -2-(x+8y); е) 8+(5x+8y).

a) \(3(4-2x) = 3 \cdot 4 - 3 \cdot 2x = 12 - 6x\) б) \(-4(5x+2) = -4 \cdot 5x - 4 \cdot 2 = -20x - 8\) в) \(-2(5x-4) = -2 \cdot 5x + (-2) \cdot (-4) = -10x + 8\) г) \(-(2x-5) = -2x + 5\) д) \(-2-(x+8y) = -2 - x - 8y\) е) \(8+(5x+8y) = 8 + 5x + 8y\)