-5m(-4n)8k
3x(-5y)(-4)
-5/8b(-5/6)(-12/25x)
9/16p(-1 1/3)3/7k
-0,2x(-4)=0,08
-0,4y(-0,8)=0,96

5m(-4n)8k=-160mnk3x(-5y)(-4)=60xy-5/8b(-5/6)(-12/25x)= -1/4bx9/16p(-1 1/3)3/7k= -9/28pk-0,2x(-4)=0,080,8x=0,08x=0,08:0,8x=0,1-0,4y(-0,8)=0,960,32y=0,96y=0,96:0,32y=3