<span>9•(7512-c)=34722</span>
<span>7512-с=34722:9</span>
<span>7512-с=3858</span>
<span>с=7512-3858</span>
<span>с=3654</span>
<span>
</span>
<span>8•a+4097=5081</span>
<span>8*а=5081-4097</span>
<span>8*а=984</span>
<span>а=984:8</span>
<span>а=123</span>
N*(70+m) nfr gjvjtve ой так по моему
1)а)0 б)66 в)-4 2)а)32х^2+18у^2+1 б)-1 в)9у^2 r)25a^2+b^2 g)81