Question

•2.Biết: x × 1,25 - x : 5 = 15,75. Như vậy, x = ….   

Answer 1

x × 1,25 - x : 5 = 15, 75

=> x ​× 1,25 - x × 1/5 = 15,75

=> x × 1,25 - x × 0,2 = 15,75

=> x × (1,25 - 0,2) = 15,75

=> x × 1,05 = 15,75

=> x = 15,75 : 1,05

=> x = 15

Answer 2

X x1,25  X :5 =15,75

X x 1,25 - X x 0,2 =15,75

X x (1,25 - 0,2 ) =15,75

X x 1,05 =15,75

X =15,75 : 1,05

X =15