7/3x+y/2=4
(x+2)/5=(y+9)/3
14x+3y=24
3(x+2)=5(y+9)
14x+3y=24
3x-5y=39
70x+15y=120
9x-15y=117
70x+9x=120+117
79x=237
x=3
y=(24+14x)/3=(24-14*3)/3=-6