378 y 1522 – 378 =-74 And -378 x + 1524=-604 Find x and y by cross multiplication method​

Question

378 y
1522 – 378 =-74 And
-378 x + 1524=-604
Find x and y by cross multiplication method​

in progress 0
Bella 1 month 2021-09-16T16:22:27+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-09-16T16:24:01+00:00

    152x +378y= -74 ……….(1)

    -378x + 152y = -604 …………(2)

    adding equation (1) and (2) ,we get.

    -226x – 226y =-678

    -1x – 1y =3 ………..(3)

    subtracting (2) from (1) , we get ,

    530x -530y =530

    1x – 1y = 1 ………..(4)

    adding (3) and (4), we get

    y= -2

    put value of y in equation (4)

    1x – 1(-2) = 1

    1x + 2= 1

    1x = 1 – 2

    1x = -1

    x = -1 / 1

    x = -1

    so (-1 ,-2) is the answer of the given simultaneous equation.

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )