Question

Ajutatimaa va roogggggg !!!!!! Dau 58 de puncte!

Answer 1

5) a) 2,5x=0⇒x=0/2,5=0
b) 3x-1=2⇒3x=2+1 ⇒ x=3:3⇒x=1
c) 4x+3=7⇒x=10/4=5/2=2,5
d) 3x=8,3 - 5⇒ x=3,3/3= 1,1
e) x:3=2/3 ⇒ x=2/3×3=2
f)  2x-1/4=9/4  ⇒ 2x= 9/4+1/4=10/4=5/2 ⇒ x=5/4=1,25
g) 2x+1=5 ⇒ 2x=4 ⇒x=4/2=2
h) 6:x=3 ⇒ x= 6 : 3=2

6) 
a) 4x=3 => x=3/4
b)  10x =5 ==> x=5/10 = 1/2
c)  2x=8/3 ⇒ x=8/3 :2=8/3 ×1/2 = 4/3= 1 intreg si 1/3
d) 12 x/5 = 6  ⇒ x= 6 : 12/5 = 6 ×5/12 = 5/2 = 2 intregi si 1/2 sau 2,5
e)  5x/7 = 5/3 ⇒ x= 5//3 :5/7 = 5/3 ×7/5 = 7/3 = 2 intregi si 1/3 sau 2, (3)
f)  3,5 x = 0,7 ⇒ x = 7/10 : 35/10 = 7/10 ×10/35 = 1/5 =0,2
g)  3,6x=0,12 ⇒ x= 120/100 : 26/10 =4/10= 2/5 = 0,4
h)  x: 7/2 = 3/21  ⇒ x= 3/21 ×7/2= 3/6=1/2