(x-83)+316=425
x – 83 + 316 = 425
x = 425 – 316 + 83
x = 192
(600-x)-92=126
600 – x – 92 = 126
– x = 126 + 92 – 600
-x = -382
x = 382
253-(x-459)=138
253 – x + 459 = 138
– x = 138 – 459 – 253
-x = -574
x = 574
502-(217-x)=421
502 – 217 + x = 421
x = 421 + 217 – 502
x = 136
871-(x+157)=385
871 – x – 157 = 385
– x = 385 + 157 – 871
-x = -329
x = 329
(x-83)+316=425
x – 83 + 316 = 425
x = 425 – 316 + 83
x = 192
(600-x)-92=126
600 – x – 92 = 126
– x = 126 + 92 – 600
-x = -382
x = 382
253-(x-459)=138
253 – x + 459 = 138
– x = 138 – 459 – 253
-x = -574
x = 574
502-(217-x)=421
502 – 217 + x = 421
x = 421 + 217 – 502
x = 136
871-(x+157)=385
871 – x – 157 = 385
– x = 385 + 157 – 871
-x = -329
x = 329