easiest stuff ever but I can't seem to get it

We are given that the function is related by the following
[tex]y=x+1[/tex]Let us find the missing values of x and y.
1st value:
Substitute y = 1 and solve for x
[tex]\begin{gathered} y=x+1_{} \\ 1=x+1_{} \\ x=1-1 \\ x=0 \end{gathered}[/tex]So, x = 0
2nd value:
Substitute x = -1 and solve for y.
[tex]\begin{gathered} y=x+1_{} \\ y=-1+1 \\ y=0 \end{gathered}[/tex]So, y = 0
3rd value:
Substitute x = 10 and solve for y.
[tex]\begin{gathered} y=x+1 \\ y=10+1 \\ y=11 \end{gathered}[/tex]So, y = 11
4th value:
Substitute y = 3 and solve for x.
[tex]\begin{gathered} y=x+1_{} \\ 3=x+1_{} \\ x=3-1 \\ x=2 \end{gathered}[/tex]Similarly, the rest of the values are calculated.