Question

solve it ... guys
0.4x+0.3y=1.7,0.7x-0.2y+0.8 solve by cross multiplcation

Answer 1

Answer:

x=2 y=3

Step-by-step explanation:

As/q

0.4x + 0.3y=1.7

0.7x - 0.2y= 0.8

Multiplying eq 1 by 2 & eq 2 by 3, we get:

0.8x + 0.6y = 3.4..(3)

2.1x - 0.6y = 2.4..(4)

now adding eq 3&4

2.9x= 5.8

x=5.8/2.9

x=2

Putting the value of x in eq (1)

--> 0.4×2 + 0.3y=1.7

--> 0.3y= 1.7-0.8

--> y=0.9/0.3

y=3

---> x=2 y=3.