Substitute method....2x-y=11;5x+4y=7
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Hi
#ur solution here!
=> 2x -y = 11......(1) & 5x +4y =7.......(2)
Form (1)
2x = 11+y
X = (11+y)/2
Put the Value of X in equation (2)
=> 5(11+y)/2 +4y = 7
=> 55+5y +8y = 14
=> 13y = 14-55
=> Y = -41/13
Put the Value of y in equation (2)
=> 5x +4×-41/13 = 7
=> 5x -164/13 = 7
Taking LCM
=> 65x -164 = 91
=> 75x = 91+164
=> X = 255/75
Or
X = 3.4. Ans
✌☺
#ur solution here!
=> 2x -y = 11......(1) & 5x +4y =7.......(2)
Form (1)
2x = 11+y
X = (11+y)/2
Put the Value of X in equation (2)
=> 5(11+y)/2 +4y = 7
=> 55+5y +8y = 14
=> 13y = 14-55
=> Y = -41/13
Put the Value of y in equation (2)
=> 5x +4×-41/13 = 7
=> 5x -164/13 = 7
Taking LCM
=> 65x -164 = 91
=> 75x = 91+164
=> X = 255/75
Or
X = 3.4. Ans
✌☺
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