Question

решите систему уравнений 3х=2у
х+у=4

Answer 1

3x=2y
x=4-y ;

3*(4-y)=2y;
12-3y=2y;
5y=12;
y=12/5
y=2,4
x=1,6

Answer 2

$left { {{3x=2y} atop {x+y=4}} right \ left { {{3(4-y)=2y} atop {x+y=4}} right. \ 12-3y=2y \ y = frac{12}{5} \ x= frac{8}{5}$