CBSE Class 10 Answered
solve the equation for x and y
Asked by shobhitdc | 28 May, 2010, 01:12: PM
Expert Answer
Dear Student,
1.
1/5x + 1/6y = 12 ............(1)
1/3x - 3/7y = 8.................(2)
Multiply eqn(1) by 3/7 and eqn(2) by 1/6
3/35x+1/14y = 36/7...............(3)
1/18x - 1/14y = 4/3................(4)
eqn(3)+eqn(4)
=>89/630x = 136/21
=> x =89/4080
Substituting this value in eqn(1):
y = 89/1512
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2.
2x/a + y/b = 2 ............(1)
x/a - y/b = 4................(2)
eqn(1)+eqn(2)
3x/a = 6
=>x=2a
Substitute in eqn (1)
=>y = -2b
Regards Topperlearning.
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