Question

b) 2x + y = 10
23x-2y = 1​

Answer 1

$\left \{ {{2x+y=10} \atop {23x-2y=1}} \right.$

$\left \{ {{4x+2y=20} \atop {23x-2y=1}} \right.$

$4x+23x+2y-2y=20+1$

$27x=21$

$x=\frac{21}{27}$

$x=\frac{7}{9}$

$2x+y=10$

$2.\frac{7}{9}+y=10$

$\frac{14}{9}+y=10$

$y=10-\frac{14}{9}$

$y=\frac{90}{9}-\frac{14}{9}$

$y=\frac{76}{9}$