Question

помоги даю десять балов

Answer 1

3)2,65 4)-18,9 5)30,2

Answer 2

x+(-0.35)=2.3
x-0.35 =2.3

x=2.65

 

-23.5+(-y)=-4.6

-23.5-y=-4.6

-y=-4.6+23.5

-y=18.9

y=-18.9

 

y+(-48.3)=-78.5

y-48.3=-78.5

y=-78.5+48.3= -30.2