a + 2b + 2c = 302
b = a + 9
a × ( b - a ) = 414
-------------------------------
a , b , c = ?
a ( b - a ) = 414
a ( a + 9 - a ) = 414
9a = 414
a = 46
b = a + 9
b = 46 + 9
b = 55
a + 2 ( b + c ) = 302
46 + 2 ( 55 + c ) = 302
46 + 110 + 2c = 302
156 + 2c = 302
2c = 146
c = 73