The only t table I know about is the statistical t and that doesn't fit a pre-algebra problem. So I assume you mean to substitute -3 for x and you want to know y. Then substitute 4 for y and you want to know x.
If so,
y = 3x+7
y = 3(-3)+7
y = -9+7
y = -2
etc. Check my work.
if y=3x+7
how do you finish the t-table for linear equation?
X y
-3 blank
blank 4
2 answers
(5x+9y)(5x-9y)