Question

te rog ajuta ma urgent . 21 .Rezolva in Q ecuatiile:​

Answer 1

Răspuns:

Explicație pas cu pas:

i)

0,(6)x - 1/2 = 2/3

6x/8 = 1/2 + 2/3

3x/4 = 3/6 + 4/6

3x/4 = 7/6

x = 7/6 : 3/4 = 7/6*4/3 = 28/18 = 14/9

j)

2x - 1 - 3x/2 = 1/3

4x/2 - 3x/2 = 1 + 1/3

x/2 = 4/3

x = 8/3

k)

2 + x/5 - x = 5/2

2 + x/5 - 5x/5 = 5/2

2 - 4x/5 = 5/2

2 - 5/2 = 4x/5

4/2 - 5/2 = 4x/5

-1/2 = 4x/5

-5 = 8x

x = -5/8

l)

3x/4 + 1,2 - 0.75x = 6/5

0,75x + 1/2 - 0,75x = 1,2

1,2 = 1,2 adevarat pentru orice x

m)

1,4x + 3/2 - 2x/5 - 1 = 1/2

1,4x - 0,4x + 1/2 = 1/2

x = 0