4) If 3x + 5y = 9 and 5x + 3y = 7, find the value of x + y
IIA. Complete the following activities
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Answers
Answered by
0
Answer:
the answer is 2.
Step-by-step explanation:
3x+5y=9
5x+3y=7
add both of them,
=> 8x+8y=16
=>x+y=2
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Answered by
0
Answer:
3x+5y=9-----(1)
5x+3y=7-----(2)
multiplying eq(1) by 5 & eq(2) by 3 we get
15x+25y=45
-15x ± 9y= - 21
_____________
16y=24
y=
16
24
=
2
3
[y=
2
3
] and x=
3
9−5x
2
3
=
2
−1
Hence[x=
2
1
]& [y=
2
3
]
so x+y=
2
1
+
2
3
=2
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