Question

Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = −1

A x = 0
B x = 2
C There is no x value as there is no solution.
D x can be any value as there is an infinite number of solutions.

My answer is B, am I Correct

Answer 1

rewrite an equation
2x+y=1
y=-2x+1
sub it in the other equation
4x+2(-2x+1)=-1
4x-4x+2=-1
4x-4x=-3
The x's cancel out so there is no other x.

Answer 2

so i wasn't correct?

Answer 3

so it would be C right?

Answer 4

Yes, B and D will not be the answers

Answer 5

Most likely A or C.

Answer 6

thanks for your help i say C is the answer :)

Answer 7

Your Welcome