Question

Реши систему уравнений: ​

Answer 1

$\left \{ {{0,2x+0,5y=5,4,} \atop {\frac{1}{2}x-\frac{1}{8}y=2,5. }} \right.$

$\left \{ {{0,2x+0,5y=5,4} \atop {x=5+\frac{1}{4} y}} \right.$
$0,2(5+\frac{1} {4} y)+0,5y=5,4$
$y=8$

$x=5+\frac{1}{4} *8$

$x=7$

$(x,y)=(7,8)$

$\left \{ {{0,2*7+0,5*8=5,4} \atop {\frac{1}{2}*7-\frac{1}{8}*8=2,5 }} \right.$

$\left \{ {{\frac{27}{5} =\frac{27}{5} } \atop {\frac{5}{2}=\frac{5}{2} }} \right.$
$(x,y)=(7,8)$
$x=7\\y=8$