№1481 Запишите числитель и знаменатель дроби в виде целых чисел и сократите: 1) 2) №1482...

1) ..........=(-0,05*5*0,17*3)/(0,05*0,17)= - 5*3= - 15
2) .........=(1,9*(3+1)*0,48*3) / (-1,9*0,48)= - 4*3=12

1482.
$1) \left \{ {{y=3x} \atop {x+3x=4}} \right. \left \{ {{y=3x} \atop {4x=4}} \right. \left \{ {{y=3x} \atop {x=1}} \right. \left \{ {{y=3} \atop {x=1}} \right. \\ \\ 2) \left \{ {{x=2y} \atop {4y+y=-5}} \right. \left \{ {{x=2y} \atop {5y=-5}} \right. \left \{ {{x=2y} \atop {y=-1}} \right. \left \{ {{x= -2} \atop {y=-1}} \right. \\ \\ 3) \left \{ {{x=y+1} \atop {2y+2+y=5}} \right. \left \{ {{x=y+1} \atop {3y=5-2}} \right. \left \{ {{x=y+1} \atop {3y=3}} \right.$ $\left \{ {{x=y+1} \atop {y=1}} \right. \left \{ {{x=3+1} \atop {y=1}} \right. \left \{ {{x=4} \atop {y=1}} \right.$