The sum of one-third of a number and 10 is equal to 13. what is the number?

9.

Step-by-step explanation:

1/3 plus 10 equals 10.33333 but if you were to divide 1/3 by 9 you get three

3 +10 =13

hope this helps plz mark brainliest

don't know sorry bru

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true