Six pencils are equal in value to two rulers. one ruler is equal in value to two erasers. twelve pencils are equal in value to how many erasers.

Answer with Step-by-step explanation:

Six pencils are equal in value to two rulers.

i.e. Value of 6 pencils=Value of 2 rulers

Value of 6×2 pencils=Value of 2×2 rulers

Value of 12 pencils=Value of 4 rulers (1)

One ruler is equal in value to two erasers.

i.e. Value of 1 ruler=Value of 2 erasers

Value of 1×4 rulers=Value of 2×4 erasers

Value of 4 rulers=Value of 8 erasers  (2)

By equation (1) and (2), we get

Value of 12 pencils  = Value of 8 erasers  

Hence, Twelve pencils are equal in value to eight erasers

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9