x + 7y =10 ; 3x - 2y = 7
Answers
Answered by
70
x+7y = 10 ---------(1)
3x-2y= 7 ----------(2)
(1) ×2 + (2) ×7 -----------
2x + 14y = 20
21x - 14y = 49
——————————
23x = 69
or, x = 3
now, the value of x put in no.(1)
3+7y =10
or, 7y =7
or, y = 1
ANS: x= 3 & y=1
3x-2y= 7 ----------(2)
(1) ×2 + (2) ×7 -----------
2x + 14y = 20
21x - 14y = 49
——————————
23x = 69
or, x = 3
now, the value of x put in no.(1)
3+7y =10
or, 7y =7
or, y = 1
ANS: x= 3 & y=1
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Answered by
15
SOLUTION :
x+7y=10_______(1)
3x-2y=7_________(2)
MULTIPLYING 3 IN EQUATION (1)
3x+21y=30______(3)
SUBTRACTING EQUATION(2) FROM EQUATION(3)
3x+21y=30_______(3)
3x-2y=7 ___________(2)
23y=23
THEREFORE, y=1
SUBSTUTING THE VALUE OF x IN EQUATION?(1)
x+7y=10
x=10-7
x=3
ANSWER. (3,1)
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