Mathematics: Sole the system of equation by elimination 2x + 2y = 4 x - 2y = 11

Sole the system of equation by elimination 2x +

Ответ:

pnewma16

31.12.2021

1. Find x :

$\left \{ {{2x+2y=4} \atop {x-2y=11}} \right.$

$\left \{ {{2x+2y=4} \atop {-x+2y=-11}} \right.$

$\left \{ {{2x=4} \atop {-x=-11}} \right. \\ \\
3x=15\\
x=5$

2. Find y :

$2*5+2y=4 \ \textless \ =\ \textgreater \ 2y = 4-10 \ \textless \ =\ \textgreater \ y = -3$

3. Conclusion :

So x=5