Question

tìm x

a, 0,75.x+0,75.x+x=30

b, 30% .x+2.x=46

Answer 1

b ) 30% . x + 2 . x = 46

0,3 . x + 2 . x = 46

x . ( 0,3 + 2 ) = 46

x . 2,3 = 46

x = 46 : 2,3

x = 20

Answer 2

a ) 0,75 . x + 0,75 . x + x = 30

x . ( 0,75 + 0,75 + 1 ) = 30

x . 2,5 = 30

x = 30 : 2,5

x = 12

Answer 3

2.5x=30

x=12

b 23/10x=46

x=20

Answer 4

a, 0,75.x+0,75.x+x=30

=> x.(0,75+0,75+1)=30

=> x. 2,5=30

=> x= 30 : 2,5= 12

Vậy x=12

b, 30% .x+2.x=46

=> x.(0,3+2)=46

=> x. 2,3 = 46

=> x= 46 : 2,3= 20

Vậy x=20

Chúc bạn Hk tốt!!!!!

Answer 5

a) 0,75 . x + 0,75 . x + x = 30

=> x . ( 0,75 + 0,75 + 1 ) = 30

=> x . 2,5 = 30

=> x = 12

b) 30 % . x + 2 . x = 46

=> x . ( 30 % + 2 ) = 46

=> x . 2,3 = 46

=> x = 20

Answer 6

 ) 30% . x + 2 . x = 46

0,3 . x + 2 . x = 46

x . ( 0,3 + 2 ) = 46

x . 2,3 = 46

x = 46 : 2,3

0,75 . x + 0,75 . x + x = 30

x . ( 0,75 + 0,75 + 1 ) = 30

x . 2,5 = 30

x = 30 : 2,5

x = 12