( х+2у=5 < (-х+7у=13

Question

( х+2у=5
<<br> (-х+7у=13

Answer 1

X=5-2y
-5+2y+7y=13

x=5-2y
9y=18

x=5-2y
y=2

x=5-2*2
y=2

x=1
y=2
ответ: (1,2)