[mary belle]

mmm
i think eno lezem nerja3 la kteb l madrse..o akeed ma fee 3ende yeh hala2 ..o nesye ltheorems kelon ,,bs ba3ref 7ot l equations l2an sahleen hehe

1. x+y = 15 ( x-y)
2. x=2y
3. x/ ( x-y) = y
4. x(x-y) = (40)

o hala2 dor lt3wid la na3mel new composition lal unknown,,mmm

eza bdna n2oul eno n7ot m7al kl x (2y) fa hayda msh sa7..l2an ma byetla3 ma3na l correct solution..
laken shou bdna n3mel
...!!

hon l sou2al lol?

yeee..lk bedha formulation mn awal o ana nasye l math welle 5tara3o kmen
loool
bs i will try

lk shou hl problem wlo
bs ma 7a ee2as

mm
l equ.1. ma3 3.
ya3ne
x/(x-y)=y heye (x-y)=x/y
(x+y)=15(x-y)
bs n3awed btseer
(x+y)=15(x/y)
hala2 darb beba3d

(x+y) = 15x/y)
xy+y^2=15x

xy+y^2 - 15x=0..{..5**

mnerja3 lal equa. abel..x(x-y)=40 ,,, x=2y

x^2 -xy =40
x(x-y)=40
x(x/y)=40

2y(2y/y)=40
4y^2/y=40
4y=40
y=40/4
y=10

o hala2 mnerja3 lal equa (5)**

xy+y^2 -15 x=0
10x+(10)^2 -15x =0
10x+100 -15x=0
-5x+100=0
-5x=-100
x=100/5
x=20


l solution heye
x=20
y=10




youppyyyyyyyyy
hahaha