Question

Last One , Please Help Me ?

Solve, using the substitution method.

y + 2x = 7
14 – 4x = 2y

A.
The solution is (1, 5)

B.
The solution is (21, 0)

C.
There are an infinite number of solutions.

D.
There is no solution.

Answer 1

Ok then lets use the first equation. Leave the 'y' alone, like this:
\[y = 7 -2x\]
and plug this 'y' in the second equation. This method is called substitution.
\[14 - 2x = 2(7 - 2x)\]
\[14 - 2x = 14 - 4x\]

Fourteens will simplify itselves, so you get :
\[2 = 4\]

So there is no solution.