Answer:
-14
Step-by-step explanation:
difference between -20 and -5 = 15
15 x 2/5 = 30/5 = 6
-20 + 6 = -14
Solve the literal equation 2xy - xz = 4 for x
x = 4/(2y-z)
y =/ z/2
6.9 has 1 decimal, therefore we'll use 1 zero and lose the dot
B) The system of equations has a solution