Решить уравнение 2700+у·400=170700 (12300-30):к=30

<span>2700+у*400=170
</span><span>у*400=2700-170
</span><span>у*400=2530
</span><span>у=2530:400
</span><span>у=6,325
</span>
<span>n+1240 =1060*20
</span><span>п-1240=21200
</span><span>п=21200+1240
</span><span>п=22440
</span>
<span>d-(240*13)=1 260
</span><span>д-3120=1260
</span><span>д=1260+3120
</span>д=4380<span> 

</span><span>(a+109)*30=6 510
</span><span>а+109=6510:30
</span><span>а+109=217
</span><span>а=217-109
</span><span>а=108.</span>