Question

решите систему:
(2х+1):5=(у-1):2
4х+5у=23

Answer 1

24(2x+1)=5(y-1)
x+5y=23
x=23-5y
24(46-10y+1)=5(y-1)
1128-240y=5y-5
-240y-5y=-1128-5
-245y=-1133
y=(-1133)/(-245)
y =4,624
x=23-5y
x=23-5*4,624=23-23,12
x=-0,12