Question

x/a+y/4=1 , 3x/4-(x-y)/2=7/4​

Answer 1

I think your answer will be x

Answer 2

$\frac{x}{a} + \frac{y}{4} = 1 \\ 4x + ay = 4a......(1)\\ \frac{3x}{4} - \frac{(x - y)}{2} = \frac{7}{4} \\ \frac{x + 2y}{4 } = \frac{7}{4} \\ x + 2y = 7 \\ 4x + 8y = 28........(2) \\ from \: (1) \: and \: (2) \: we \: get \\ y(a - 8) = 4a - 28$