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2014-08-16T19:14:37+08:00
Question:
x-y= 5  /equation 1
3x+ 5y= -9 / equation 2
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Solution:
Find the formulae of x in terms of y
From 1, x=5+y / equation 3

Now, find the value of y
From 2, 3(5+y) + 5y= -9
              15+ 3y+ 5y = -9
              15+ 8y = -9
               8y = -9-15
               8y = -24
               y = -3
We know value of y. 

Finally, find the value of x.
From 3, x= 5+y
              x= 5+ (-3)
              x=5-3
              x= 2

# y= -3
# x= 2



1 5 1
2014-08-16T21:02:49+08:00
X-y=5---1
3x+5y=-9---2
Dari2,
3x+5y=-9
3x=-9-5y
x=-9-5yper3---3
sub x=-9-5yper3,3dlm1
x-y=5
-9-5yper3-y=5((3drb-ydan5
-9-5y-3y=15
-9-8y=15
-8y=15+9
-8y=24
8y=-24
8yper8=-24per8
y=-3
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sub y=-3 into1,
x-y=5
x-(-3)=5
x+3=5
x=5-3
x=2
>x=2,y=-3
btl x jwpn q?