3x - y + z = 5 . . . (1)
x + 3y + 3z = -6 . . . (2)
x + 4y - 2z = 12 . . . (3)
From (2), x = -6 - 3y - 3z . . . (4)
Substituting for x in (1) and (3) gives
3(-6 - 3y - 3z) - y + z = 5 => -18 - 9y - 9z - y + z = 5 => -10y - 8z = 23 . . (5)
-6 - 3y - 3z + 4y - 2z = 12 => y - 5z = 18 . . . (6)
(6) x 10 => 10y - 50z = 180 . . . (7)
(5) + (7) => -58z = 203
z = 203/-58 = -3.5
From (6), y - 5(-3.5) = 18 => y = 18 - 17.5 = 0.5
From (4), x = -6 - 3(0.5) - 3(-3.5) = -6 - 1.5 + 10.5 = 3
x = 3, y = 0.5, z = -3.5
3^4 and 3^-6
multiply, add, subtract?
Answer:
It is at 0 that mean that is the answer right?
Step-by-step explanation:
Answer:
6^21 = B
Step-by-step explanation:
![[6^{7} ]^{3} \\(6)^7^*^3\\6 ^{21} \\](https://tex.z-dn.net/?f=%5B6%5E%7B7%7D%20%5D%5E%7B3%7D%20%5C%5C%286%29%5E7%5E%2A%5E3%5C%5C6%20%5E%7B21%7D%20%5C%5C)
I believe if Socratic is right the answer is -x+4y=8
