Question

if 1 star = 3tens than 2 star + _= 73

Answer 1

1 star = 3 tens = 3 * 10 = 30 .

Now,

2 star + _____ = 73

2 ( 30) + ______ = 73

______ = 13 .

Required answer is 13

Answer 2

Hi!

1 star = 3tens , that is, 3×10=30
2 star= 2×30=60

Now,

2star (60)+__=73
60+__=73
60+13=73


Thus, '13' will replace the blank.

Hope it helps...!!!