х +70480=120 000 30600-у=1900 240700-и=180950. z-49430=87960
Х+70480=120000 х=120000-70480 х=49520 30600-у=1900 у=30600-1900 у=28700 240700-и=180950 и=240700-180950 и=59750 z-49430=87960 z=49430+87960 z=137390
Х + 70480 = 120000. х= 120000- 70480. х=49520. 30600 - у =1900. х= 30600-1900. х= 28700. 240700-u=180950. u=240700-180950. u=59750. z- 49430=87960. z=87960+49430. z= 137390