Question

What is the first step in solving the linear system
{2x − 3y = 11
{−x + 5y = −9
by the substitution method in the most efficient way?
A. Solve the first equation for x.
B. Solve the first equation for y.
C. Solve the second equation for x.
D. Solve the second equation for y.
I have no idea pls help

Answer 1

I'd go with B, since
-x + 5y = -9 means that
x = 5y+9
and you can use that to do the solution of #1.

Any other substitution would involve some fractions.

Answer 2

What is tha first to solved this system of linear equations