Question

900-х=254+142                    a+325=124
                                             150+a+1000-540
d-254=452-121                     c+90=76+80
x-180=250+50

Answer 1

900-х=254+142
900-х=396
х=900-396
х=504
d-254=452-121    
d-254=331
d =331+254
d=585
x-180=250+50
х-180=300
х=300+180
х=480
a-325=124
а=124+325
а=449
 150+a+1000-540=610+а
c+90=76+80
с+90=156
с=156-90
с=66