Question

упростите 4 выражения
1.24 (в,г), 1.25 (в,г)

Answer 1

1.24
в)14a-12b-a-b=13a-13b=13(a-b)=13(2/7+5/7)=13
г) 0.7y-(0.2x-0.3y)+0.2x=0.7y-0.2x+0.3y+0.2x=y=-0.14
1.25
в) 2(4a-0.5b)-(3a-7b)=8a-b-3a+7b=5a+6b=-2+2=0
г) -6(2/3a-1/6b)+4(0.75a-1/12b)=-4a+b+3a-1/3b=7a-2/3b=-7-1=-8