Question

$0.2x+0.1y=25$
$2\left(x-2\right)-1.6y=116$

Answer 1

$0.2x+0.1y=25...\left(i\right)$

$2(x-2)-16y=116...\left(ii\right)$

By solving (ii) eq.

$2x-4-16y=116$

$2x-1.6y=120$

$x-0.8y=60\times 2$

$0.2x+0.1y=25\times 8$

$\Rightarrow x-0.8y=60$

$1.6x+0.8y=200$

$2.6x=260$

$x=\frac{2600}{216}$

$x=100$

$\therefore 0.2\left(100\right)+0.1y=25$

$20+0.1y=25$

$0.1y=5$

$y=00$