Question

va rog eu foarte rapid 4,5, 6, 7​

Answer 1

Atasat răspunsul!succes

Answer 2

4x/x4 = 7/4

(40 + x)/(10x + 4) = 7/4

160 + 4x = 70x + 28

160 - 28 = 70x - 4x

66x = 132

x = 132 : 66

x = 2

3a = 4b => a = 4b/3

inlocuim

6a = xb

6×4b/3 = xb

24b = 3xb  | : b

3x = 24

x = 8

a/3 = 4/b => a = 12/b

a/b = (12/b)/b = 12/b : b/1 = 12/b x 1/b = 12/b²