Question 60976
x-y=9  or  x=y+9 then
2(y+9)-4y=7
2y+18-4y=7
-2y=7-18
-2y=-11
y=-11/-2
y=5.5 solution
then
x=5.5+9
x=14.5 solution
proof
2*14.5-4*5.5=7
29-22=7
7=7