Question

2x+5y=28 and 5x+3y=30 find the value of x and y by cross multiplication method​

Answer 1

Answer:

The given system of equations is 3x+5y−25=0

7x+6y−30=0

Now, writing the coefficients for cross multiplication, we get

−150+150

x

=

−175+90

y

=

18−35

1

. i.e.,

0

x

=

−85

y

=

−17

1

.

Thus, we have x = 0, y = 5. Hence, the solution is (0, 5).

Answer 2

Answer:

Solve the following pair of linear equation by cross - multiplication method:

2x + 3y = 46;

3x + 5y = 74