Problem
inear $5 x-15 y+z=-4$ ?
Solution
Step 1 ：Express z in terms of x and y: \(z = -5x + 15y - 4\)
Step 2 ：\(\boxed{z = -5x + 15y - 4}\)
Step 1 ：Express z in terms of x and y: \(z = -5x + 15y - 4\)
Step 2 ：\(\boxed{z = -5x + 15y - 4}\)
