А) (761238 : 6) - 26984 = 99889
б) (663530 + 85967) : 7 = 107071
в) (846 * 111) - (127512 :4) = 62 028
г) (753 * 202) + (404 * 909) = 519342
{ 3x + y = 4
{ -5х+2у=8
2(3x+y)−(−5x+2y)=2⋅4−<span>8
</span><span>11x=0</span><span>x=<span>0
</span></span>3(0)+y=<span>4
у=4
ответ:(0;4)</span>