2 x + z = 12
z = 12 - 2 x
if x is + then must be <6 if z is to be +
If x, y, z are positive numbers, x = y and x + y + z = 12, then which of the following is true?
a) x < 6 b) x = 6 c) x > 6
1 answer
a) x < 6 b) x = 6 c) x > 6
1 answer