Question

Reduceti termenii asemenea:
a)2,5x+0,5x-1,5x+3,5x-1,2x=
b) 3,75b-1,25b+(b-0,3b)-(0,7b+0,3b)=
c)2,9y+(1,25y+5,75y)+0,1y=
d)2,7a-(3,8a-0,3a+0,5a)+1,3a=

Answer 1

a) 2,5x+0,5x-1,5x+3,5x-1,2x=(2,5+0,5-1,5+3,5-1,2)x=3,8x
b) 3,75b-1,25b+(b-0,3b)-(0,7b.+0,3b)=3,75b-1,25b+0,7b-1b=(3,75-1,25+0,7-1)b= 2,2b
c) 2,9y+(1,25y+5,75y)+0,1y=2,9y+7y+0,1y=(2,9+7+0,1)y=10y
d) 2,7a-(3,8a-0,3a+0,5a)+1,3a=2,7a-4a+1,3a=(2,7-4+1,3)a=0a

Answer 2

$a).2,5x+0,5x-1,5x+3,5x-1,2x= \\ =3x-1,5x+3,5x-1,2x= \\ =1,5x+3,5x-1,2x= \\ =5x-1,2x= \\ =3,8x$
$b).3,75b-1,25b+(b-0,3b)-(0,7b+0,3b)= \\ =3,75b-1,25b+0,7b-b= \\ =2,5b+0,7b-b= \\ =3,2b-b= \\ =2,2b$
$c).2,9y+(1,25y+5,75y)+0,1y= \\ =2,9y+7y+0,1y= \\ =9,9y+0,1y= \\ =10y$
$c).2,7a-(3,8a-0,3a+0,5a)+1,3a= \\ =2,7a-(3,5a+0,5a)+1,3a= \\ =2,7a-4a+1,3a= \\ =-1,3a+1,3a= \\ =0$