Redukcja wyrazów podobnych.
Oblicz :
a) 2/5 x + 3/7 x + x
b) 2 ( 3/4b + 0,6) - b
c) 2 (a - 3/8 w) - (a + 4/5 w)
d) 3k + 4k - 6k
e) 4,2 x - 5,1 x + 3x
f) 2 ( 1/3 b + 4) - b
g) 2/3 ( a - w) - 0,4 ( a + w )
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a)2/5x+3/7x+x=14/35x+15/35+x= 1 29/35x
b)2(3/4b+0,6)-b=1,5b+1,2-b=0,5b+1,2
c)2(a-3/8w)-(a+4/5w)=2a-6/8w-a-4/5w=a-30/40w-32/40w=a-62/40w=a-1 11/20w
d)3k+4k-6k=k
e)4,2x-5,1x+3x=2,1x
f)2(1/3b+4)-b=2/3b+8-b=-1/3b+8
g)2/3(a-w)-0,4(a+w)=2/3a-2/3w-0,4a-0,4w=8/30a-32/30w=4/15a- 1 1/15w