Question

x−y=4.5

5x+2y=5

how to solve...? and what are these types of questions called

Answer 1

x = (4.5+y)
Substitute this in the place of x for the second equation. You will get the answer.

Answer 2

:< lemme try
5(4.5+y)+2y=5
22.5+5y+2y=5
7y=-17.5
y=-2.5
x=2

?

Answer 3

Yes it's right.
2-(-2.5) = 4.5

Answer 4

so so... how to solve this? :L
\[\log_{a}(x/y)=4.5\] and \[\log_{a}x^{5}y^{2}=5\], find the value of \[\log_{a}\sqrt{xy}\]