Question

The sum of three consecutive multiples of 3 is equal to 6 more than four times the smallest multiple. What is the largest multiple ?.

a.)9
b.)12
c.)15
d.)18

Answer 1

Answer for this one is a

Answer 2

Answer: (a) 9

Explanation:

1st multiple of 3: 1(3x)

2nd multiple of 3: 2(3x)

3rd multiple of 3: 3(3x)

Sum = 4(1st multiple of 3) + 6

1(3x) + 2(3x) + 3(3x) = 4(3x) + 6

3x + 6x + 9x = 12x + 6

18x = 12x + 6

6x = 6

x = 1

Largest (3rd) multiple is: 3(3x)

= 9x

= 9 · 1

= 9