a) x*15/2/3=5
x=5*3*2*15
x=450
đúng cho mình nha
x . 15 : 2 : 3 = 5
x . 15 : 2 = 5 . 3
x . 15 : 2 = 15
x . 15 = 15 x 2
x . 15 = 30
=> x = 2.
25 . 4 + (150.x) = 200
100 + (150.x) = 200
150 . x = 200 - 100
150 . x = 100
=> x = 0,6666...
a) x . 2,5 = 5
x = 5 : 2,5
x = 2
b) 100 + 150 . x = 200
150 . x = 200 - 100
150 . x = 100
x = 100 : 150
x = \(\frac{2}{3}\)
x . 15 : 2 : 3 = 5
x . 15 : 2 = 5 x 3
x . 15 : 2 = 15
x . 15 = 15 x 2
x . 15 = 30
x = 30 : 15
x = 2
25.4 + (150 . x) = 200
100 + (150 . x) = 200
150 . x = 200 - 100
150 . x = 100
x = 100 : 150
x = 0,66......
x . 15 : 2 : 3 = 5
x . 15 : 2 = 3 . 5
x . 15 : 2 = 15
x . 15 = 15 . 2
x . 15 = 30
x = 30 : 15 = 2
Vậy x = 2
b,25 . 4 + ( 150 . x ) = 200
100 + ( 150 . x ) = 200
150 . x =100
x = 150 : 100 = 1,5
Vậy x = 1,5
