Question

Solve:
$50x+24y=1000$
$x+y=100$

Answer 1

$50x+24y=1000$.......(1)

$x+y=100$........(2)

Eqn $\left(1\right)-50\times \left(2\right)$

$\Rightarrow -26y=-4000$

$y=\frac{2000}{13}$

$x=100-\frac{2000}{13}=\frac{-700}{13}$