Question

0.5x + 0.2y = 5;
0.6x + 0.4y = 8.4

Answer 1

Answer:

The answer for the following expression will be:

$x=4\\y=15$

Step-by-step explanation:

The given function is:

$0.5x+0.2y=5\,\,\,\,\,<strong>eqn</strong>(1)\\0.6x+0.4y=8.4\,\,\,\,\,<strong>eqn</strong>(2)$

Multiplying eqn(1) with 2 in both side we get:

$(0.5x+0.2y=5)\times 2\\1x+0.4y=10\,\,\,\,\,eqn(3)$

Therefore solving eqn(2) and eqn(3) we get:

$x=4$

Plugging the value of x in eqn(1) we get:

$0.5\times 4+0.2y=5\\2+0.2y=5\\0.2y=3\\y=15$