Решите 500-(120-х)=479-99, 220+(х-120)=997-736

500-(120-х)=479-99,
<span>500-(120-х)=380
</span><span>120-х=500-380
</span><span><span>120-х=120
</span>х= 120-120
х=0

220+(х-120)=997-736 </span>
220+(х-120)=261
<span>х-120=261-220
х-120=41
х=120+41
х=161</span>