X+2y=7 2x-3y=5 Решите

Question

X+2y=7
2x-3y=5
Решите

Answer 1

X+2y=7
2x-3y=5

x=7-2y
2*(7-2y)-3y=5
14-4y-3y=5
-7y=5-14
-7y=-9
y=9/7

x=7-2y=7-2*9/7=31/7
ответ:x=31/7; y=9/7