1. (x + 450) - 3540 = 4000 : 80
x + 450 - 3540 = 4000 : 80
x = 500 - 450 + 3540
x = 3590
2. (1234 + n) + 2140 = 52741
1234 + n + 2140 = 52741
n = 52741 - 1234 - 2140
n = 49367
1. (x + 450) - 3540 = 4000 : 80
x + 450 - 3540 = 4000 : 80
x = 500 - 450 + 3540
x = 3590
2. (1234 + n) + 2140 = 52741
1234 + n + 2140 = 52741
n = 52741 - 1234 - 2140
n = 49367