" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
y+4=2x+3y
x+3y=0
2x+2y=4/:(-2)
x+3y=0
-x-y=-2
---------- +
2y=-2
y=-1
x-1=2
x=3
a=-1+4=3
b=2*3-1=5
P=a*b
P=3*5=15