Question

5x+0.1y=6.2 and 3x-0.4y=11.2 . solve this by method of elimination by equating co efficients

Answer 1

Answer:x=36/23,y=374/23

Step-by-step explanation:

5x+0.1y=6.2-----1

3x-0.4y=11.2-----2

Solving eqn.s 1&2 we get,

eqn.1 *(4)+eqn.2,

20x+0.4y=24.8

3x -0.4y= 11.2

-------------------------

23x =36

x =

$\frac{36}{23}$

Putting the value of x in eqn 1 we get,

180/23+0.1y=6.2

0.1y=-37.4/23

y=

$\frac{374}{23}$