Question

Determine if the point (-1,1) lies on both lines in the system of equations by substituting the ordered pair into both equations

Answer 1

the first equation is:

$4x-3y=-7$

Second equation is:

$\begin{gathered} 8x-6y=-14 \\ 2(4x-3y)=-7\times2 \\ 4x-3y=-7 \end{gathered}$

at the point (-1,-1) the final value of boath system is same infect the bothe function graph is overlap in all intervel of function then any possible change in one function then it exist for another function.