Question

2 X + 5 Y is equal to 7 and 6 x minus 5 Y is equal to 11 by cross multiplication method​

Answer 1

Answer:

• x = 17/7 , y = 5/7

Step-by-step explanation:

1. 2x + 3y -7 = 0
2. 6x - 5y -11 = 0
3. 1a = 2 , 1b = 3 , 1c = -7
4. 2a = 6 , 2b =  -5 , 2c = -11
5. x= 1b × 2c - 2b × 1c

            1a × 2b - 2a ×1b

    6.  x = 3 ( - 11) - { -5 (-7)} ÷ 2 ( -5) - { 6 ( 3)}

     7. x = -33 -35

               -10 - 18

    8.  x = - 68

                -28

     9.  x= 68      = x = 17 / 7

                28  

• y = 1c (2a) - 2c(1a)  

                1a(2b) - 2a(1b)  

• y = -7(6) - {-11 (2)}

             2 (-5) -  { 6 (3)}

• y = - 42 - (-22)

               -10 - ( 18)

• y = -42 + 22

               -10 -18

• y =  -20       = y = 20

               -28                 28

• 5/7