What are the values of the expression 1-y; y + 8; 3y-4.5 take positive values?

Y will take a positive value in the expression if this expression is greater than 0. That is, we get:
1) 1 – y> 0;
We transfer the known values to one side, and the unknown ones to the other side. when transferring values, their signs change to the opposite sign. That is, we get:
– y> – 1;
y <- 1 / (- 1);
y <1;

2) y + 8> 0;
y> – 8;

3) 3 * y – 4. 5> 0;
3 * y – 4 integers 5/10> 0;
3 * y – 4 integers 1/2> 0;
3 * y – 9/2> 0;
3 * y> 9/2;
y> 9/2/3;
y> 9/2 * 1/3;
y> 3/2.