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