Question

please solve this guys!!​

Answer 1

Answer: A - (i) x+y+z and (ii) 7-6x

Answer 2

ANSWER:-

$QUESTION 1 \\ ⟶ \frac{x}{2} + \frac{y}{3} + \frac{z}{4} + \frac{2x}{3} + \frac{3y}{4} + \frac{4z}{5} \\ \\ ⟶ \frac{x}{2} + \frac{2x}{3} + \frac{y}{3} + \frac{3y}{4} + \frac{z}{4} + \frac{4z}{5} \\ \\ ⟶ \frac{3x + 4x}{6} + \frac{4y + 9y}{12} + \frac{5z + 16z}{20} \\ \\ ⟶ \frac{7x}{6} + \frac{13y}{12} + \frac{21z}{20} \\ \\ ⟶ \frac{7x}{6} - \frac{x}{6} + \frac{13y}{12} - \frac{y}{12} + \frac{21z}{20} - \frac{z}{20} \\ \\ ⟶ \frac{7x - x}{6} + \frac{13y - y}{12} + \frac{21z - z}{20} \\ \\ ⟶ \frac{6x}{6} + \frac{12y}{12} + \frac{20z}{20} \\ \\ ⟶(x + y + z)$

QUESTION 2

⟶5X-[4X-{(2X-5)-3(3X-4)}]

⟶5X-[4X-{(2X-5-9X+12)}]

⟶5X-[4X-{-7X+7}]

⟶5X-[4X+7X+7]

⟶5X-11X+7

⟶-6X+7 or 7-6X