1000x+1500(30-x)=39000
1000x + 45000 – 1500x = 39000
1000x – 1500x = 39000 – 45000
-500x = -6000
x = 12
1000x+1500(30-x)=39000
1000x + 45000 – 1500x = 39000
1000x – 1500x = 39000 – 45000
-500x = -6000
x = 12