Question

Algebra 1 multiple choice word problem.

Answer 1

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?

2x + y = 9
−x − y = −8

A. −8 + y

B. −8 − y

C. 8 + y

D. 8 − y

Answer 2

−x − y = −8
Each side of the above equation multiplied by -1:
x + y = 8
Can you take it from here?

Answer 3

D. perhaps?