Question

Solve the system by substitution. Write the solution.
x+5y=4
2x+10y=8

Answer 1

ok subtract 5y so you get
x=-5y+4 then plug it in
\[2(-5y+4)+10y=8\] solve

Answer 2

If it were me, I would divide the second by 2 and then stop in my tracks - seeing that there would be nothing left to do.

Answer 3

But if you subtract 5y wouldn't you also subtract 4 and x?

Answer 4

well.. it says by "substitution"
so.... why not just solve one for either "x" or "y"
and then substitute on the other
see what you get

Answer 5

Which is what @pooja195 did.

Answer 6

I would consider any recognition that it cannot be solved, or the solution is obvious, in compliance with the request for "substitution".