Question

1)Reduceti termenii asemenea:
a)4x+2x-3x=
b)15a-a-5a=
c)9z+11z-8z+z=
d)10m+3m-9m=
2)Reduceti termenii asemenea:
a)2,5x+0,5x-1,5x+3,5x-1,2x=
b)3,75b-1,25b+(b-0,3b)-(-,7b+0,3b)=
c)2,9y+(1,25y+5,75y)+o,1y=
d)2,7a-(3,8a-0,3a+0,5a)+1,3a=
3)Efectuati:
a) 11m+(3n-5m+6)-(4m-2n-8)=

Answer 1

$1a).4x+2x-3x=6x-3x=3x \\ b).15a-a-5a=14a-5a=9a \\ c).9z+11z-8z+z=20z-8z+z=12z+z=13z \\ d).10m+3m-9m=13m-9m=4m$
$2a).2,5x+0,5x-1,5x+3,5x-1,2x=3x-1,5x+3,5x-1,2x= \\ =1,5x+3,5x-1,2x=5x-1,2x=3,8x \\ b).3,75b-1,25b+(b-0,3b)-(0,7b+0,3b)= \\ =3,75b-1,25b+0,7b-b=2,5b+0,7b-b=3,2b-b=2,2b \\ c).2,9y+(1,25y+5,75y)+0,1y=2,9y+7y+0,1y= \\ =9,9y+0,1y=10y \\ d)2,7a-(3,8a-0,3a+0,5a)+1,3a=2,7a-(3,5a+0,5a)+1,3a= \\ =2,7a-4a+1,3a=-1,3a+1,3a=0$
$3a).11m+(3n-5m+6)-(4m-2n-8)= \\ =11m+3n-5m+6-4m+2n+8=2m+5n+14$