02 Solve the following pair of linear eq by elimination method ...
1. 3 x - 8y = - 2 and 9 X + 4 y = 8
2. x\6 + y\15 = 4 and x\3 - y\12 = 19\4
3. 0.5 - 0.1 y = 0.7 and 1.5 X + 0.3 y = 3.9
4. ax + by = b - a and bx - ay = -(a+b)
rajbibek1992:
QESTION NO 3 wala kyqa 0.5x hoga ya fir sirf 0.5 hai
Manei to 0.5x assume karke kiya hai solve
vo 0.5x hai multipli nhi hai bhai mere
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1. 3x - 8y = -2•••••••••••(1)
9x + 4y = 8•••••••••••(2)
equation (1)*3
=9x- 24y= -6•••••••••(3)
equation (2)-(3)
9x + 4y = 8
9x - 24y = -6
(-) (+) (+)
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28y=14
y=14/28
y=1/2
put y in (2)
3x - 8*1/2 = -2
3x - 4 = -2
3x = -2+4
3x = 2
x = 2/3
Therefore x = 2/3 and y = 1/2
only 1 bhai 4 hai
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