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

Question

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

pooja195 · Answer

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

tkhunny · Answer

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.

anonymous · Answer

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

jdoe0001 · Answer

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

luffingsails · Answer

Which is what @pooja195  did.

tkhunny · Answer

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