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MonaLoveYou
a fost răspuns

Rezolvati in Q+ ecuatiile:
a) 2,5x + 3 = 9,75
b) 0,25 * x + 1 = 1,5
c) 0,(2)x + 0,5 = 0,75
d) 5/3 x + 2/9 = 1 1/3
e) 2,5 + 1/4 x = 5
f)2x-1,4=2,5
g) 0,(1) x -3 =5 1/4

Răspuns :

Mikkka
a) 2,5x=9,75-3 ⇒ 2,5x=6,75 ⇒ x=6,75 :2,5⇒ x=2,7
b)0,25x=1,5-1⇒ 0,25x=1⇒ x=1:0,25⇒ x=4
c)2x/9=0,75-0,5⇒ 2x/9=0,25⇒ x=1/4:2/9 = 1/4 *9/2=9/8⇒x=9/8
d) 5x/3 = 4/3-2/9 =12/9 - 2/9=10/9⇒ x=10/9:5/3=10/9*3/5=2/3⇒x=2/3
e) x/4= 5-2,5⇒x/4=2,5⇒ x=2,5 *4=10⇒x=10
f)2x=2,5+1,4=3,9⇒ x=3,9 :2= 1,95⇒ x=1,95
g) x/9= 21/4+12/4⇒ x/9=33/4⇒ x=33/4*9= 297/4 ⇒ x=297/4

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