Question

The sum of three consecutive multiples of 7 is 63 . Find these multiples

Answer 1

let three consecutive numbers be = x ,x+7,x+7+7
ATQ
x+x+7+x+7+7=63
3x+21=63
3x=63-21
3x=42
x=42/3
x=14
so the numbers are 14,14+7=21,14+7+7=28

Answer 2

Let the 3 consecutive multiples of 7 are
x, x+7, x+14

x+x+7+x+14=63
3x+21=63
3x= 63- 21
3x= 42
x= 42/3
x= 14
1 multiple = x= 14
2 multiple = x+7= 14+7=21
3 multiple = x+14= 14+ 14= 28

The 3 multiples are 14 , 21, 28