1)=х/у
2)=5/(м-3)
3)=а(х-2)
4)= не видно
-3x+5y-3=0
б)
5y-3=3x
x=(5y-3)/3
в)
5y=3x+3
y=3(x+1)/5
S=(a1+a2013)/2*2013
S=(1+2013)/2*2013=<em><u>2027091</u></em>
-18.следовательно -6=×/3=-18
4M + [ ( 1 - 6M^2 ) / M ] = ( 4M^2 + 1 - 6M^2 ) / M = ( 1 - 2M^2 ) /M
M = 2
( 1 - 8 ) / 2 = ( - 7 ) / 2 = ( - 3,5 )