3/4*60 + 1/5*45 = 3*60/4 + 45/5 = 54 км
2 + 2x > 3x
2 > 3x - 2x
x < 2
Ответ: (-∞; 2)
<span> (3х^-1/4y^-3) * 6xy^2=3/x*y³/4*6xy²=3y³/4x*6xy²=4.5y⁵</span>