It works out that: z = -32
(5z + 9)(3z - 2)
(5z - 3)(z - 3)
Without an equality sign and not knowing the plus or minus value of 81 it can't be solved. If you mean: z+81 = 9z-7 Then: z-9z = -7-81 => -8z = -88 By dividing both sides by -8: z = 11
Add together like terms: 8z-3y
9z-5z = 30+z 3z = 30 z = 10
The following steps lead you to the correct answer: 9z = 5z + 16 9z - 5z = 16 4z = 16 z = 4, thus the correct answer is z = 4
4z + 2 + 5z - 3 = 9z - 1
3-5z
9x + 3y + 5z - 5x + 4z - 7y = 4x - 4y + 9z
2 + 14z = -8 + 9zSubtract 9z from each side:2 + 5z = -8Subtract 2 from each side:5z = -10Divide each side by 5:z = -2
The above expression simplifies to 2x-y+9z
8x + 9z
12x-4y+9z+2y =12x-2y+9z
-8z + 5z = -3z
It is: 5(z+5) = 5z+25
8x + 5z - 4x + 3z + 6 = 8x - 4x + 5z + 3z - 6 = 4x + 8z - 6