Question

Buna dimineata am nevoie de ajutor putin la mate dau 10 puncte o coroana si 5 stele la cine imi face corect si vreu sa vina repede raspunsul​

Answer 1

Răspuns:

Explicație pas cu pas:

1).

a). [3/4+2/3:(3/4-1/2)]*6/41=

[3/4+2/3:(3/4-2/4)]*6/41=

(3/4+2/3:1/4)*6/41=

(3/4+2/3*4/1)*6/41=

(3/4+8/3)*6/41=

(9/12+32/12)*6/41=

41/12*6/41=

1/2

b). [7/5:14/15+3/2:(9/4-11/2)]*2/7=

[7/5:14/15+3/2*(9/4-3/2)]*2/7=

[7/5:14/15+3/2*(9/4-6/4)]*2/7=

(7/5:14/15+3/2*3/4)*2/7=

(7/5*15/14+3/2*3/4)*2/7=

(3/2+9/8)*2/7=

(12/8+9/8)*2/7=

21/8*2/7=3/4

c).nu am invatat cu perioada

d). [4+62/3-21/4*(2/3-2/9)]:45/6+29/4=

[4+20/3-9/4*(6/9-2/9)]:29/6+29/4=

(4+20/3-9/4*4/9):29/6+29/4=

(4+20/3-1):29/6+29/4=

(12/3+20/3-3/3):29/6+29/4=

29/3:29/6+29/4=

29/3*6/29+29/4=

2+29/4=

8/4+29/4=

37/4

2). a). 25/2*9=225/2          b). 28/13:7=28/13*1/1=4/13

3).7x+4y x=2/3    y=9/5

7*2/3+4*9/5=23/3+29/5=115/15+87/15=202/15

4). 32/5*21/4=17/5*9/4=153/20

5).

a). (x+2 8/15)*3/2=5 1/4

(x+38/15)*3/2=21/4

(x+38/15)=21/4:3/2

(x+38/15)=21/4*2/3

x+38/15=7/2

x=7/2-38/15

x=105/15-76/15

x=29/15

b). 109/50:y=109/1000 y=109/1000:109/50  y=109/1000*50/109   y=1/20

6). 54 17/20=1097/20

1 1/5=6/5

2 3/10=23/10

6/5*15=18m pentru 15 perechi de pantaloni

23/10*8=92/5 m pentru 8 costume

1097/20-(18+92/5)=

1097/20-(90/5+92/5)=

1097/20-182/5=

1097/20-728/20=

369/20 m stofa raman

sper sa fie bine