Question

Solve for y.

a= (x+y+z)/ 3

a) y = a - 3x - z
b) y = a - x - 3z
c) y = 3a - x - z

Answer 1

multiply by 3 to get
\[3a=x+y+z\] then subtract \(x\) and \(z\) from both sides

Answer 2

as always, the answer is C