9z-5z = 30+z 3z = 30 z = 10
2 + 14z = -8 + 9zSubtract 9z from each side:2 + 5z = -8Subtract 2 from each side:5z = -10Divide each side by 5:z = -2
4z + 2 + 5z - 3 = 9z - 1
3-5z
It is 20z-18 when simplified
9x + 3y + 5z - 5x + 4z - 7y = 4x - 4y + 9z
The above expression simplifies to 2x-y+9z
9z
9z+8 = 3z-10 9z-3z = -10-8 6z = -18 z = -3
8x + 9z
12x-4y+9z+2y =12x-2y+9z
-3z+17+12z = 11 9z = -6 z = -2/3