Question

what is the solution of the following system of equations?

2y - x = 8
y = 2x + 1

a) (1,2)
b) (5,2)
c) (2,1)
d) (2,5)

and the answer i picked is c

thank you,
poo :)

Answer 1

Here is how to check your answer.

Plug your assumed values of x=2 and y=1 into the equations.
2y - x = 3, not 8
2x + 1 = 5, not 1

Your answer is therefore wrong. How did you get it?

Have you tried the method of substitution?
It tells you that
4x +2 -x = 8
3x = 6

You can take it from there.