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Dau coroana + 30 puncte
Rezolvati in Q ecuatiile :
a) x/2 - 3/5 = 0
b) 7/5x+ 2/3 = 0
c) -5/8x+7/4 = 0
d) = 3,1+9,3 = 0

Răspuns :

Leeajsyk
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Vezi imaginea Leeajsyk
Icecon2005
a) x/2 - 3/5 = 0
x/2-3/5=0
5x-6=0
x=6/5=1 intreg si 1/5

b) 7/5x+ 2/3 = 0
 7x/5-2/3=0
 21x-10=0
x=10/21

c) -5/8x+7/4 = 0
-5x/8+7/4=0
-5x+14=0
-5x=-14
x=14/5=2 intregi si4/5

d)
-3,1x + 9,3 = 0
-31x/10+93/10=0
-31x=-93
x=-93/31
x=-3/1

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