Question

Реши уравнения.800-×=254+142.d-254=352-121.×-180=250+45.a+235=900-124.100+а=920-540.с+70=67+80.

Answer 1

1.800-х=254-142
800-х=112
-х=112-800
х=688
2.d-254=352-121
d-254=231
d=231+254
d=485
3.а+235=900-124
а+235=776
а=776-235
а=541
4.100+а=920-540
100+а=380
а=380-100
а=280
5. с+70=67+80
с+70=147
с=147-70
с=77