1) 5x - 279 = 31165x = 3116 + 2795x = 3395x = 3395/5x = 679
2) 496a - 597 = 48507496a = 48507 + 597496a = 49104a = 49104/496a = 99
3) 89a - 3987 = 3722089a = 37220 + 398789a = 41207a = 41207/89a ≈ 462.58
1) 5x - 279 = 3116
5x = 3116 + 279
5x = 3395
x = 3395/5
x = 679
2) 496a - 597 = 48507
496a = 48507 + 597
496a = 49104
a = 49104/496
a = 99
3) 89a - 3987 = 37220
89a = 37220 + 3987
89a = 41207
a = 41207/89
a ≈ 462.58