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a fost răspuns

rezolvati ecuatia :
a)4.x+=8
b) 4.x=2
c) 2/3.x=4/9
d)5/7.x=1
e)7/5:x=1
f)1/4:=3/4
g)1/4:x=3
h)1/2.x=2
acest semn inseamna supra ''/'' cine are raspunsul correct va avea o surpriza +coroana

Răspuns :

a) x=8/4
x=2

b) x=2/4=simplif=1/2

c) 2x/3=4/9
2x·9=3·4
18x=12
x=12/18=simplif=2/3

d) 5x/7=1
5x=7·1
x=7/5

e)7/5:x/1=1
7/5·1/x=1
7/5x=1
7=5x
5x=7
x=7/5

f)1/4:x/1=3/4
1/4·1/x=3/4
1/4x=3/7
7=3·4x
7=12x
12x=7
x=7/12

g) 1/4:x=3
1/4·1/x=3
1/4x=3
1=3·4x
12x=1
x=1/12

h) x/2=2
x=2·2
x=4

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