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Efectuati:
a)0,5x+0,7x-0,6x+3,5x-1,8x
b)2,25a-1,65a+(3a-a)-(a-0,7a)
c)3,9y+(2,55y+3,45y)+0,1y
d)0,3b-(1,5b-0,7b+o,2b)+2b
Rezolvare completa va rog! Dau coroana!


Răspuns :

a)0.5x+0.7x-0.6x+3.5x-1.8x=

=0.5x+0.1x+1.7x=

=2.3x

b)2.25a-1.65a+(3a-a)-(a-0.7a)=

=0.6a+2a-0.3a=

=2.6a-0.3a=

=2.3a

c)3.9y+(2.55y+3.45y)+0.1y=

=3.9y+6y+0.1y=

=4y+6y=

=10y

d)0.3b-(1.5b-0.7b+0.2b)+2b=

=2.3b-(1.7b-0.7b)=

=2.3b-1b=

=1.3b
Sper ca te am ajutat!