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Răspuns :

Cristinatibulca
a. 2x+1,7=3,5, 2x=3,5-1,7, 2x=1,8, x=1,8:2, x=0,9
b. 3x-18,25=13,89, 3x=13,89+18,25, 3x=32,14, x=10,71(3)
c. 9,57-5x+3,4=5,002, 9,57-5x=5,002-3,4, 9,57-5x=1,602, 5x=9,57-1,602, 5x=7,968, x=1,593
d. 1,6x-3,3=1,5, 1,6x=1,5+3,3, 1,6x=4.8, x=3
e. 2,1x-32,1=9,6, 2,1x=9,6+32,1=41,7, x=41,7;2,1=19,85
f. 2,3-0,3x=0,8, 0,3x=2,3-0,8=1,5, x=1,5:0,3=5
Dydy123
a)
2x=3,5-1,7
2x=1,8 ⇒x=1,8 :2⇒x=0,6

b)3x=18,25+13,89⇒3x=32,14⇒x=10,7

c)5x+3,4=9,57-5,002⇒5x+3,4=4,568
 5x=1,168⇒x=1,168:5

d)1,6x= 3,3+1,5=4,8
 x=48:16⇒x=3

e)2,1x=32,1+9,6=41,7
x= 42,7 :21

f)0,3 x=2,3+0,8=3,1
 ⇒x=31:3=10,1

Unde nu a mai caluculat poti sa le scri sub forma de fractie ca noua asa ne a spus profa! XDD 

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