In one month ,answer runs 15 times as many miles as sack runs. altogether they run 192 miles. how many miles does answer run in one month

 a = 15 × m ;
a + m = 192 ; where a = how many miles runs answer ; m = how many miles runs answer ;
15m + m = 192 ;
16m = 192 ;
m = 192 / 16 ;
m = 12 miles ;
a = 15 × 12 ;
a = 180 miles ;