Tick (✓) the correct answer:
If $z=\frac{4}{5}(z+10),\mathrm{then}z=?$
(a) 40
(b) 20
(c) 10
(d) 60

Q.

If $z=\frac{4}{5}(z+10)$, then z = ?

(a) 40

(b) 20

(c) 10

(d) 60

Q.

Minimum z = x + 2y subject to x ≤ 20, y ≥ 10, x ≥ 0, y ≥ 0

Q. Tick (✓) the correct answer:
If $\frac{n}{n+15}=\frac{4}{9}$, then n = ?
(a) 4
(b) 6
(c) 9
(d) 12

Q. Tick (✓) the correct answer:
If 3m = 5m$-\frac{8}{5}$, then m = ?
(a) $\frac{2}{5}$
(b) $\frac{3}{5}$
(c) $\frac{4}{5}$
(d) $\frac{1}{5}$

Q. Tick (✓) the correct answer:
If $2y+\frac{5}{3}=\frac{26}{3}-y$, then y = ?
(a) 1
(b) $\frac{2}{3}$
(c) $\frac{6}{5}$
(d) $\frac{7}{3}$