Question

Solve using substitution:
-y − 5x = -7
2y − 2x = 14

A) Infinitely many solutions
B) No solution
C) (7/5, 14)
D) (0, 7)

Answer 1

Solution is (0,7)..
So, D is the answer...

Answer 2

Find y from the first equation : y = 7 - 5x

Put it in second equation:

we get, x = 0

and y = 7...

Answer 3

considering the given equations...
equation 1 can be writen as 5x+y=7, equation 2 can be written as -2x+2y=14
we need to solve these two equations now.
we can get to the ans (x,y)=(0,7)