dianewade15
dianewade15
03-02-2015
Mathematics
contestada
How do I solve x+4y=22
-x+5y=23
Respuesta :
eu99li
eu99li
03-02-2015
x+4y=22
-x+5y=23
(+)
9y=45
y=5
x+4*5=22
x=22-20
x=2
Answer Link
mac32b
mac32b
03-02-2015
{ x + 4y = 22 ( + x - x = 0 )
{ - x + 5y = 23
4y + 5y = 22 + 23
9y = 45
y =
45
9
y = 5
x + 4y = 22
x + 4 . 5 = 22
x + 20 = 22
x = 22 - 20
x = 2
S = { 2 , 5 }
Answer Link
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