Solve the system of equations by substitution7x-2=2y
3X=2y-1

y=13/4

x=3/4

tell you teacher that problems like tis one should be

done with elimination method, only use substation is a variable is already isolated !

Step-by-step explanation:

7/2 x -1 = y

3x= 2(7/2x-1) -1

3x = 7x-2 -1

3x = 7x -3

-4x = - 3

x = 3/4

y = 3(3/4)+1 = 9/4 + 4/4 = 13/4

i belive those are the ones that are under 90 degreese.