Question

do question number 8 9 10 give in details

Answer 1

8.let the numbers be x and y
x + y =18
if one is y than other is 2y
now 2y + y =18
3y = 18
y = 18/3
y =6
now substitute the value of y
x + y =18
x = 18-y
x = 18-6
x = 12
hence the number is 12 and 6


9. let the numbers be x and y
x + y = 195
if one is y than other is 15 y
now ,
15y + y = 195
16y=195
y=195/16
y = 12.1875
now substitute the value of y
x+ y =195
x= 195-y
x= 195-12.1875
x = 182.8 125.

10.l et the consecutive even numbers be 2x 4x 6x
now
2x + 4x + 6x =54
12x =54
x =54/12
x = 4.5
hence the numbers be
2x = 2×4.5 =9
4x = 4×4.5 =18
6x = 6×4.5 =27