{4y-x=6
c){17y=0
{a=b
d){2a+b=9
{u=4v
e){5u-v=10
{3r=s
f){3r+s=24
c)4y-x=6
17y=0
4y-x=6
y=0
-x=6 /:(-1)
x=-6
d)
a=b
2a + b=9
2a+a=9
3a=9 /3
a=3
b= 3
e)
u=4v
5u-v=10
20v - v = 10
19v=10 /:19
v=10/19
u=4*10/19=40/19
f)
3r=s
3r+s=24
3r+3r=24
6r=24 /:6
r=4
s=3*4=12
c)
d)
e)
f)
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