Question

the sum of two consecutive multiples of 3 is 69 .find them

Answer 1

3×11=33
3×12=36
33+36=69

Answer 2

Let the two consecutive multiple of 3 be 3x,6x

According to question
3x+6x=69
9x=69
x= 69/9=7

So the numbers are 3×7=21
6×7=42
______
69