6x=4x+10
6x-4x=10
2x=10
x=10/2
х=5
9+y=4y
y-4y=-9
-3y=-9
y=-9/-3
у=3
7z+9=4z
7z-4z=-9
3z=-9
z=-9/3
z=-3
6x=4x+10
6x-4x=10
2x=10
x=10/2
х=5
9+y=4y
y-4y=-9
-3y=-9
y=-9/-3
у=3
7z+9=4z
7z-4z=-9
3z=-9
z=-9/3
z=-3