Question

7x+5y=44, 4х+3y=25
Solve by cross multiplication method

Answer 1

Answer:

The given system of equations is 7x+5y−44=0

4x+3y−25=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:

Step-by-step explanation:

7x=44-5y

x=(44-5y)/7

putting the value of in 2nd equation

4(44-5y)/7+3y=25

(176-20y)/7+3y=25

(176-20y+21y)/7=25

176-y=175

-y=175-176

-y=-1

y=1

put the value of y in any eqauation

7x+5y=44

7x+5(1)=44

7x+5=44

7x=44-5

7x=39

x=39/7

x=5.57