Question

x + 7y =10 ; 3x - 2y = 7

Answer 1

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

Answer 2

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)