(y+1.17)*(-12)=76.8 (y-0.61)*27=-78.03

1.(y+1.17)*(-12)=76.8,-12у - 14,04 = 76,8,
-12у = 76,8 + 14,04,
-12у = 90,84,
у = -7,57,
2.(y-0.61)*27=-78.03,27у - 16,47 = -78,03,
27у = -78,03 + 16,47,
27у = -61,56,
у = -2,28

1) y+1.17=78,8:(-12);
y+1.17=-6.4;
y=-7.57   
2) y-0.61=-78.03:27;
 y-0.61=-2.89;
 y=-2.89+0.61;
 y=-2.28