z/3 + 8
10/4 - z - 8/16 = 21/2 - z - 1/2 = 2 - z
(z - 8) / 6 = -4 Multiply both sides by 6: (z - 8) = -24 Add 8 to both sides: z = -16
3 over 4 minus 3 over 8 can be simplified by finding a common denominator, which in this case is 8. Rewriting 3 over 4 as 6 over 8, the subtraction becomes 6 over 8 minus 3 over 8, which equals 3 over 8.
It is 3 over 8 or 3/8
7 (seven)
10
z/3 + 8
3
10/4 - z - 8/16 = 21/2 - z - 1/2 = 2 - z
z = 3.6
(z - 8) / 6 = -4 Multiply both sides by 6: (z - 8) = -24 Add 8 to both sides: z = -16
If that were z^2 - 16z + 64, it would factor very neatly to (z - 8)(z - 8) or (z - 8)^2 As it is, you could use z(z^2 - 16) + 64 or the much more cumbersome -1/27 (3 z+2 2^(2/3) (3 (9-sqrt(69)))^(1/3)+4 3^(2/3) (2/(9-sqrt(69)))^(1/3)) (-9 z^2+(12 3^(2/3) (2/(9-sqrt(69)))^(1/3)+6 2^(2/3) (3 (9-sqrt(69)))^(1/3)) z-8 2^(1/3) (3 (9-sqrt(69)))^(2/3)-48 3^(1/3) (2/(9-sqrt(69)))^(2/3)+48)
8
3 over 4 minus 3 over 8 can be simplified by finding a common denominator, which in this case is 8. Rewriting 3 over 4 as 6 over 8, the subtraction becomes 6 over 8 minus 3 over 8, which equals 3 over 8.
8=(15-z)/68*6=15-z48=15-z33=-zz=-33
It is 3 over 8 or 3/8