{x|x ϵ W, 5 < x <15}
jz² - 16x²= 7y² + 49wz². Give the equation for z in terms of w, x, y and j.
14 <= 2 - 3g < 15
(x-2)^2
(x-1)^2
[4÷(6-2)+7²] - [2-(-5)]²
2x+y=6
2x-y=2
18400/441
-13/14 ×-3/9 × 4/7 ×-9/2
-3/-4