Question

va rooog
am nevoie urgent
dau corona
e pentru maine
nu e neaparat toate punctele ​

Answer 1

Răspuns:

Explicație:

a)

2x - 1/4 = 3/4

2x = 3/4 + 1/4

2x = 4/4 = 1

x = 1/2

___________

b)

7/3 + 8x = 10/3 - 1

8x = 10/3 - 7/3 - 3/3 = 0

x = 0

_____________

c)

(3x - 7)/2 = (4x - 3)/3

3(3x - 7) = 2(4x - 3)

9x - 21 = 8x - 6

9x - 8x = 21 - 6

x = 15

_______________

d)

x/2 + 5/6 = 1/3

x/2 = 2/5 - 5/6 = -3/6 = -1/2

x = -2*1/2 = -1

_______________

e)

x/2 + 1/5 = (4x - 3)/10

(5x + 2)/10 = (4x - 3)/10

5x + 2 = 4x - 3

5x - 4x = -2-3

x = -5

_______________

f)

(2x - 5)/4 = (3x + 4)/5

5(2x - 5) = 4(3x + 4)

10x - 25 = 12x + 16

12x - 10x = -25 - 16

2x = -41

x = -41/2