Question

Rezolvatii urmatoarele ecuatii in care x este fractie zecimala:
A) x+2=11,5
B) x-5,31=20
C) 14,2-x=7,56
D) 8,41+x=49,41
E) 3•1,76+x=12,12
F) 39,39:13+x=44,29
G) 2x-10,6=29,4
H) 4,39+11,5•3+x=70,706
I) 4x-1=3,24
J) x•5=65,15
K) x:3,24=13,5

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Answer 1

a)x+2=11,5
x=11,5-2
x=9,5
P:9,5+2=11,5
b)x-5,31=20
x=20+5,31
x=25,31
P:25,31-5,31=20
c)14,2-x=7,56
x=14,2-7,56
x=6,64
P:14,2-6,64=7,56
d)8,41+x=49,41
x=49,41-8,41
x=41
P:8,41+41=49,41
e)3*1,76+x=12,12
5,28+x=12,12
x=12,12-5,28
x=6,84
f)39,39:13+x=44,29
3,03+x=44,29
x=44,29-3,03
x=41,26
g)2x-10,6=29,9
2x=29,9+10,6
x=40,5:2
x=20,25
h)4,39+11,5*3+x=70,706
4,39+34,5+x=70,706
38,89+x=70,706
x=70,706-38,89
x=31,0,56
L)4x-1=3,24
4x=3,24-1
X=2,24:4
X=0,56
J)x*5=65,15
X=65,15:5
X=13,03
K)x:3,24=13,5
X=13,5×3,24
X=43,74