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=314
3)(x-506)+ 215=429
(x-506)=429-215
(x-506)=214
x=506+214
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)=126+254
(942-a)=380
a=942-380
a=562
6)(801-b)-224=368
(801-b)=368+224
(801-b)=592
b=801-592
b=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=314
3)(x-506)+ 215=429
(x-506)=429-215
(x-506)=214
x=506+214
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)=126+254
(942-a)=380
a=942-380
a=562
6)(801-b)-224=368
(801-b)=368+224
(801-b)=592
b=801-592
b=209