Question

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rezolvati in Q ecuatiile
a) 3/5x +1/2= 7/8
b)4/5x+1/2x=7/10
c)0,2:x=0,5
d)2 intregi 7/20+3 intr. 4/15+x=5 intr. 6/5+3/2 x(ori) 11/5
e)8/3 x-2,1(3)=5

Answer 1

3/5x+1/2=7/8
24x+20=35
24x=35-20
x=15/24
x=5/8
b) 4/5x+1/2x=7/10
8x+5x=7
13x=7
x=7/13
c) 0,2:x=0,5
x=0,5/0,2
sau  x=5/10*10/2=5/2
d) 47/20+49/15+x=31/5+33/10
141+196+60x=372+198
60x=570-337
60x=233/60
e) 8/3x-192/90=5
240x-192=450
240x=450+192
x=642/240