1) 13.6y - 3.64 = 1.8;
13.6y = 1.8 + 3.64;
13.6y = 5.44;
y = 0.4;
2) (3.7a - 1.24) * 2.5 = 8;
3.7a - 1.24 = 8 : 2.5;
3.7a - 1.24 = 3.2;
3.7a = 4.44;
a = 1.2.
1) 13.6y - 3.64 = 1.8;
13.6y = 1.8 + 3.64;
13.6y = 5.44;
y = 0.4;
2) (3.7a - 1.24) * 2.5 = 8;
3.7a - 1.24 = 8 : 2.5;
3.7a - 1.24 = 3.2;
3.7a = 4.44;
a = 1.2.