Solve for X- 9xsquare -9(a+b)x+ ( 2asquare + 5ab + 2bsquare)
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(x,y)
=
(3,−
12
)
Explanation:
[1]
XXXX
3x+4y=7
[2]
XXXX
5x−2y=16
Multiply [2} by 2 giving
[3]
XXXX
10x−4y=32
Add [1] and [3]
[4]
XXXX
13x=39
Divide both sides by 13
[5]
XXXX
x=3
Substitute
3
for
x
in [1]
[6]
XXXX
3
(3)
+4y=7
Simplify
[7]
XXXX
4y=−2
[8]
XXXX
y=−12
=
(3,−
12
)
Explanation:
[1]
XXXX
3x+4y=7
[2]
XXXX
5x−2y=16
Multiply [2} by 2 giving
[3]
XXXX
10x−4y=32
Add [1] and [3]
[4]
XXXX
13x=39
Divide both sides by 13
[5]
XXXX
x=3
Substitute
3
for
x
in [1]
[6]
XXXX
3
(3)
+4y=7
Simplify
[7]
XXXX
4y=−2
[8]
XXXX
y=−12
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