This week in math I have learned how to solve and sub with linear equations.
ex: y=3x-7 and y=-x+9
first, I would sub in -x+9 for y of y=3x-7
next I would subtract 9 from each side
then I would subtract 3x from each side
Then I would divide each side by -4
Which would make x=4. Now I would imput 4 into y=-x+9
Now to solve for y
to double check my answer I would do the same with the other question:
That is how you do it.