1. 4893 : (x + 145) = 21
x + 145 = 4893:21
x + 145 = 233
x = 233 - 145
x = 88
2. (2×x - 149) + 237 = 7924
2x - 149 = 7924 - 237
2x - 149 = 7687
2x = 7687 +149
2x = 7836
x = 3918
1. 4893 : (x + 145) = 21
x + 145 = 4893:21
x + 145 = 233
x = 233 - 145
x = 88
2. (2×x - 149) + 237 = 7924
2x - 149 = 7924 - 237
2x - 149 = 7687
2x = 7687 +149
2x = 7836
x = 3918