Question

Rezolvati ecuatiile:
a) x+2/3=7/3
b) 3/7+x=4/7
c) 3/7 -2/35=x
d) 2intregi1/5+x=3intregi1/7
e) 7intregi 1/3-x=3intregi1/7
f)5/12=26/15-x-19/60
g) x-8/3=1/24

Answer 1

a)x+2/3=7/3
   x=7/3-2/3
   x=5/3
b)3/7+x=4/7
   x=4/7-3/7
   x=1/7
c)3/7-2/35=x
   amplificam 3/7 cu 5 si ne da 15/35
    15/35-2/35=x
    x=13/35
d)2intregi1/5+x=3intregi1/7
   2/5+x=3/7
   x=3/7-2/5
aplificam 3/7 cu 5 iar 2/5 cu 7
   x=15/35-14/35
   x=1/35
e)7intregi1/3-x=3intregi1/7
   -x=3/7-7/3
aplificam 3/7 cu 3 iar 7/3 cu 7
   -x=9/21-49/21
   -x=-40/21
minus cu minus se simplifica 
   x=40/21
f)5/12=26/15-x-19/60
   5/12=17/12-x
   x=17/12-5/12
   x=1
g)x-8/3=1/24
   x=1/24+8/3
   8/3 il aplificam cu 8
   x=1/24+64/24
   x=65/24

Succes!