Question

tim x

x:4=675

x:3=87

x*2=7890

Answer 1

x : 4 = 675 

x = 675 * 4 

x = 2700

x : 3 = 27 

x= 27 * 3 

x = 81 

x * 2 = 7890 

x = 7890 : 2 

x = 3945

Answer 2

x : 4 = 675

=> x = 675 x 4 = 2700 

x : 3 = 87

=> x = 87 x 3 = 261

x * 2 = 7890

=> x = 7890 : 2 = 3945