Question

срочно !!!!!!!!!!!!!!!!!

Answer 1

2)
3x+2y=7
x-2y=1
3(-3+2y)+2y=7
x=-3+2y
-9+6y+2y=7
8y=16
y=2
x=-3+2y=-3+4=1
3)
{2x+1y=5  /*5
{3x-5y=1
+{10+5y=25  
+{3x-5y=1
10+3x=25+1
13x=26
x=2