" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x-y=1
x=4
4-y=1
-y=1-4
-y=-3
y=3
c) 4y-x=6
17y=0/:17
y=0
4y-x=6
4*0-x=6
4-x=6
-x=6-4
x=-2
d) a=b
2a+b=9
2a+b=9
3b=9/:3
b=3
a=3
e)u=4v
5u-v=10
5*4v-v=10
20v-v=10
19v=10/:19
v=10/19