1) (134 + x) - 583 = 426
134 + x = 426 + 583
134 + x = 1009
x = 1009 - 134
x = 875
2) (208 + x) - 416 = 137
208 + x = 137 + 416
208 + x = 553
x = 553 - 208
x = 345
3) (x - 506) + 215 = 429
x - 506 = 429 - 215
x - 506 = 214
x = 214 + 506
x = 720
4) (y - 164) + 308 = 500
y - 164 = 500 - 308
y - 164 = 192
y = 192 + 164
y = 356
5) (942 - a) - 126 = 254
942 - a = 254 + 126
942 - a = 380
a = 942 - 380
a = 562
6) (801 - b) - 224 = 368
801 - b = 368 + 224
801 - b = 592
a = 801 - 592
a = 209
1) (134 + x) - 583 = 426
134 + x = 426 + 583
134 + x = 1009
x = 1009 - 134
x = 875
2) (208 + x) - 416 = 137
208 + x = 137 + 416
208 + x = 553
x = 553 - 208
x = 345
3) (x - 506) + 215 = 429
x - 506 = 429 - 215
x - 506 = 214
x = 214 + 506
x = 720
4) (y - 164) + 308 = 500
y - 164 = 500 - 308
y - 164 = 192
y = 192 + 164
y = 356
5) (942 - a) - 126 = 254
942 - a = 254 + 126
942 - a = 380
a = 942 - 380
a = 562
6) (801 - b) - 224 = 368
801 - b = 368 + 224
801 - b = 592
a = 801 - 592
a = 209