1) (134 545-х)+23=98

134545 - х + 23 = 98

134568 - х = 98

- х = 98 - 134568

-х = -134470

х = 134470

2) 20002+х×5=46002

20002+5х=46002

5х = 46002 - 20002

5х = 26000

х = 5200

3) (х+52):7=700

х+52   = 700

  7

х+52=4900

х = 4900 - 52

х = 4848

4) 34000+х×1000=76 000​

34000 + 1000х = 76000

1000х = 76000 - 34000

1000х = 4200

х = 42