Question

$\begin{gathered}10x-16y=12 \\ 5x-3y=4\end{gathered}$<br /><br />If $( x, y )$ is a solution to the system of equations above, what is the value of $x-y$?​​

Answer 1

10x-16y= 12

5x-3y=4 ...(×2)

sub

-10y = 4

y = -0.4

put in eq 2 before multiplication.

5x - 3(-0.4 ) =4

5x+1.2= 4

5x = 4-1.2

5x= 2.8

x= 0.56