Question

repede ofer de toate​

Answer 1

Răspuns:

Explicație pas cu pas:

a/b = 3/8

4a/3b = ?

a = 3b/8

4a/3b = 12b/8 x 1/3b = 12/24 = 1/2

____________________

25x/2y = 6,25

x/y = 2*6,25/25 = 0,5 = 5/10 = 1/2

y/x = 2

_____________________

x/y = 0,5 = 5/10 = 1/2

y = 2x

3x + 3y = 2x + 6x = 8x

5x - y = 5x - 2x = 3x

(3x + 3y)/(5x - y) = 8x/3x = 8/3

_______________________

x/y = 0,(6) = 6/9 = 2/3

x = 2y/3

x + y = 2y/3 + y = 2y/3 + 3y/3 = 5y/3

x / (x + y) = 2y/3 : 5y/3 = 2y/3 * 3/5y = 2/5