Question

Barbie is thinking of a number. twenty less than one third of the number is 72.

Answer 1

your answer should be 276 which was worked out by Apologiabiology

Answer 2

x is the number
20 less than 1/3 of x is 72
-20+(x/3)=72
add 20 to both sides
20-20+(x/3)=72+20
0+(x/3)=92
x/3=92
times both sides by 3
x=276

the number is 276