Question

5) 502 – (217 – x) = 421;
6) 871 – (x + 157) = 385.

Answer 1

Ответ:

502-(217-х)=421

217-х=502-421

217-х=81

х=217-81

х=136

871-(х+157)=385

х+157=871-385

х+157=486

x=486-157

x=329