solve the following equation by elimination method
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celinbiju15:
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Let 1/(3x+2y) be a
and
1/(3x-2y) be b
So equations become
2a + 3b = 17/5
10a + 15b = 17 ________(1)
AND
5a+b = 2
Multiplying it by 2
10a + 2b = 4 ________(2)
Solving (1) & (2)
10a + 15b = 17
10a + 2b = 4
- - - _________________
13b = 13
b = 1
Putting value of b in 5a+b=2
a = 1/5
1/(3x+2y) = a
1/(3x+2y) = 1/5
3x+2y = 5 _______(3)
And
1/(3x-2y) = b
1/(3x-2y) = 1
3x-2y = 1 ________ (4)
Solving 3 and 4
3x + 2y = 5
3x - 2y = 1
- + - ______________
4y = 4
y = 1
Putting value of y in (4)
x= 1
Therefore x = 1 and y= 1 are required solutions
and
1/(3x-2y) be b
So equations become
2a + 3b = 17/5
10a + 15b = 17 ________(1)
AND
5a+b = 2
Multiplying it by 2
10a + 2b = 4 ________(2)
Solving (1) & (2)
10a + 15b = 17
10a + 2b = 4
- - - _________________
13b = 13
b = 1
Putting value of b in 5a+b=2
a = 1/5
1/(3x+2y) = a
1/(3x+2y) = 1/5
3x+2y = 5 _______(3)
And
1/(3x-2y) = b
1/(3x-2y) = 1
3x-2y = 1 ________ (4)
Solving 3 and 4
3x + 2y = 5
3x - 2y = 1
- + - ______________
4y = 4
y = 1
Putting value of y in (4)
x= 1
Therefore x = 1 and y= 1 are required solutions
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