Question

calcule valor de x

7\5=x\10

6\x=12\5

Answer 1

7/5=x/10
7 × 10 = 5x
5x = 70
x = 70/5
x = 14
_______________________________________________________________

6\x=12\5
12x = 6 × 5
12x = 30
x = 30/12
x = 5/2

Answer 2

 7      x
--- = ----
 5     10

5x = 10 · 7
5x = 70
x = 70 ÷ 5
x = 14

_______________

 6     12
--- = -----
 x       5

12x = 6 · 5
12x = 30
x = 30 ÷ 12
x = 2,5



Espero ter ajudado.
Bons estudos!  : )